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R S AGGARWAL AND V AGGARWAL Solutions Mathematics Class 10 Chapter 14 Height and Distance

Chapter 14 – Height and Distance Exercise Ex. 14

Question 1

A tower stands vertically on the ground. From a point on the ground which is 20 m away from the foot of the tower, the angle of elevation of its top is found to be 60°. Find the height of the tower. [Take R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance]

Solution 1

Let AB be the tower standing on a level ground and O be the position of the observer. Then OA = 20 m and R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistanceOAB = 90° and R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistanceAOB = 60°

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Let AB = h meters

From the right R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistanceOAB, we have

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Hence the height of the tower is R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 2

A kite is flying at a height of 75m from the level ground, attached to a string inclined at 60° to the horizontal. Find the length of the string assuming that there is no slack in it. R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 2

Let OB be the length of the string from the level of ground and O be the point of the observer, then, AB = 75m and R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistanceOAB = 90° and R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistanceAOB = 60°, let OB = l meters.

From the right R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistanceOAB, we have

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 3

An observer 1.5 m tall is 30 m away from a
chimney. The angle of elevation of the top of the chimney from his eye is
60°. Find the height of the chimney.

Solution 3

 R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 4

The angles of elevation of the top of a
tower from two points at distances of 5 metres and
20 metres from the base of the tower and in the
same straight line with it, are complementary. Find
the height of the tower.

Solution 4

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 5

The angle of elevation of the top of a
tower at a distance of 120 m from a point A on the ground is 45°. If the
angle of elevation of the top of a flagstaff fixed at the top of the tower,
at A is 60°, then find the height of the flagstaff. R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 5

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 6

From a point on the ground 40 m away from
the foot of a tower, the angle of elevation of the top of the tower is 30°.
The angle of elevation of the top of a water tank (on the top of the tower)
is 45
°. Find (i) the
height of the tower, (ii) the depth of the tank.

Solution 6

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 7

A vertical tower stands on a horizontal
plane and is surmounted by a vertical flagstaff of height 6 m. At a point on
the plane, the angle of elevation of the bottom of the flagstaff is 30
° and that of the top of the flagstaff is 60°. Find the height of the tower.

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 7

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 8

A statue 1.46 m tall, stands on the top of a pedestal. From a point on the ground, the angle of elevation of the top of the statue is 60° and from the same point, the angle of elevation of the top of the pedestal is 45°. Find the height of the pedestal. R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 8

Let SP be the statue and PB be the pedestal. Angles of elevation of S and P are 60° and 45° respectively.

Further suppose AB = x m, PB = h m

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

In right R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistanceABS,

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

In right R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistancePAB,

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Thus, height of the pedestal = 2m

Question 9

The angle of elevation of the top of an unfinished tower at a distance of 75m from its base is 30°. How much higher must the tower be raised so that the angle of elevation of its top at the same point may be 60°?R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 9

Let AB be the unfinished tower and let AC be complete tower.

Let O be the point of observation. Then,

OA = 75 m

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistanceAOB = 30° and R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistanceAOC = 60°

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Let AB = h meters

And AC = H meters

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Hence, the required height is R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 10

On a horizontal plane there is a vertical tower with a flagpole on the top of the tower. At a point, 9 metres away from the foot of the tower, the angle of elevation of the top and bottom of the flagpole are 60° and 30° respectively. Find the height of the tower and the flagpole mounted on it. R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 10

Let AB be the tower and BC be flagpole, Let O be the point of observation.

Then, OA = 9 m, R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistanceAOB = 30° and R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistanceAOC = 60°

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

From right angled R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistanceBOA

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

From right angled R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistanceOAC

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Thus R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Hence, height of the tower= 5.196 m and the height of the flagpole = 10.392 m

Question 11

Two poles of equal heights are standing opposite to each other on either side of the road which is 80 m wide. From a point P between them on the road, the angle of elevation of the top of one pole is 60° and the angle of depression from the top of another pole at P is 30°. Find the height of each pole and distances of the point P from the poles.

Solution 11

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

 

 

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 12

Two men are on opposite sides of a tower.
They measure the angles of elevation of the top of the tower as 30° and 45°
respectively. If the height of the tower is 50 metres,
find the distance between the two men.

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 12

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 13

From the top of a tower 100 m high, a man
observes two cars on the opposite sides of the tower with angles of
depression 30° and 45° respectively. Find the distance between the cars.

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 13

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance 

Question 14

A straight highway leads to the foot of a
tower. A man standing on the top of the tower observes a car at an angle of
depression of 30°, which is approaching the foot of the tower with a uniform
speed. Six seconds later, the angle of depression of the car is found to be
60°. Find the time taken by the car to reach the foot of the tower form this
point.

Solution 14

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance 

Question 15

A TV tower stands vertically on a bank of
canal. From a point on the other bank directly opposite the tower, the angle
of elevation of the top of the tower is 60°. From another point 20 m away
from this point on the line joining this point to the foot of the tower, the
angle of elevation of the top of the tower is 30°. Find the height of the
tower and the width of the canal.

Solution 15

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance 

Question 16

The angle of elevation of the top of a
building from the foot of a tower is 30°. The angle of elevation of the top
of the tower from the foot of the building is 60°. If the tower is 60 m high,
find the height of the building.

Solution 16

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance 

Question 17

The horizontal distance between two towers is 60metres. The angle of depression of the top of the first tower when seen from the top of the second tower is 30°. If the height of the second tower is 90metres, find the height of the tower.  R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 17

Let AB and CD be the first and second towers respectively.

Then, CD = 90 m and AC = 60 m.

Let DE be the horizontal line through D.

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Draw BF R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistanceCD,

Then, BF = AC = 60 m

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistanceFBD = R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistanceEDB = 30°

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 18

The angle of elevation of the top of a
chimney from the foot of a tower is 60° and the angle of depression of the
foot of the chimney from the top of the tower is 30°. If the height of the
tower is 40 metres, find the height of the chimney.

According to pollution control norms, the
minimum height of a smoke-emitting chimney should be 100 metres.
State if the height of the above-mentioned chimney meets the pollution norms.
What value is discussed in this question?

Solution 18

 R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance 

Question 19

From the top of a 7-metre-high building,
the angle of elevation of the top of a cable tower is 60° and the angle of
depression of its foot is 45°. Determine the height of the tower.

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 19

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance 

Question 20

The angle of depression from the top of a
tower of a point A on the ground is 30°. On moving a distance of 20 metres from the point A towards the foot of the tower to
a point B, the angle of elevation of the top of the tower from the point B is
60°. Find the height of the tower and its distance from the point A.

Solution 20

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance 

Question 21

The angle of elevation of the top of a
vertical tower from a point on the ground is 60°. From another point 10 m vertically
above the first, its angle of elevation is 30°. Find the height of the tower.

Solution 21

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance 

Question 22

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 22

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 23

A man on the deck of a ship, 16m above water level observes that the angles of elevation and depression respectively of the top and bottom of a cliff are 60 and 30. Calculate the distance of the cliff from the ship and height of the cliff. R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 23

Let AB be the height of the deck and let CD be the cliff..

Let the man be at B, then, AB= 16 m

Let BE R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistanceCD and AE R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistanceCD

Then, R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistanceEBD = 60 and R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistanceEBC = 30

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

CE = AB = 16m

Let CD = h meters

Then, ED = (h 16)m

From right R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistanceBED, we have

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

From right R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistanceCAB, we have

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Hence the height of cliff is 64 m and the distance between the cliff and the ship = R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 24

The angle of elevation of the top Q of a
vertical tower PQ from a point X on the ground is 60°. At a point Y, 40 m
vertically above X, the angle of elevation is 45°. Find the height of tower
PQ.

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 24

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance 

Question 25

The angle of elevation of an aeroplane from a point on the ground is 45°. After flying
for 15 seconds, the elevation changes to 30°. If the aeroplane
is flying at a height of 2500 metres, find the
speed of the aeroplane.

Solution 25

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance 

Question 26

The angle of elevation of the top of a tower from a point on the same level as the foot of the tower is 30°. On advancing 150 m towards the foot of the tower, the angle of elevation becomes 60°. Show that the height of the tower is 129.9 metres. R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 26

Let AB be the tower and let the angle of elevation of its top at C be 30°. Let D be a point at a distance 150 m from C such that the angle of elevation of the top of tower at D is 60°.

Let h m be the height of the tower and AD = x m

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

In R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistanceCAB, we have

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Hence the height of tower is 129.9 m

Question 27

As observed from the top of a lighthouse, 100m above sea level, the angle of depression of a ship, sailing directly towards it, changes from 30° to 60°. Determine the distance travelled by the ship during the period of observation. R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 27

Let AB be the light house and let C and D be the positions of the ship.

Llet AD =x, CD = y

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

In R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And DistanceBDA,

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

The distance travelled by the ship during the period of observation = 115.46 m

Question 28

From a point on a bridge across a river,
the angles of depression of the banks on opposite sides of the river are 30°
and 45° respectively. If the bridge is at a height of 2.5 m from the banks,
find the width of the river.

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 28

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance 

Question 29

The angles of elevation of the top of a
tower from two points at distances of 4 m and 9 m from the base of the tower
and in the same straight line with it are complementary. Show that the height
of the tower is 6 metres.

Solution 29

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 30

A ladder of length 6 metres
makes an angle of 45° with the floor while leaning against one wall of a
room. If the foot of the ladder is kept fixed on the floor and it is made to
lean against the opposite wall of the room, it makes an angle of 60° with the
floor. Find the distance between two walls of the room.

Solution 30

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 31

From the top of a vertical tower, the
angles of depression of two cars in the same straight line with the base of
the tower, at an instant are found to be 45° and 60°. If the cars are 100 m
apart and are on the same side of the tower, find the height of the tower.

Solution 31

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance 

Question 32

An electrician has to repair an electric
fault on a pole of height 4 metres. He needs to
reach a point 1 metre below the top of the pole to
undertake the repair work. What should be the length of the ladder that he
should use, which when inclined at an angle of 60° to the horizontal would
enable him to reach the required position? R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 32

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance 

Question 33

From the top of a building AB, 60 m high,
the angles of depression of the top and bottom of a vertical lamp post CD are
observed to be 30
°  and 60° respectively. Find

(i) the
horizontal distance between AB and CD,

(ii) the
height of the lamp post,

(iii) the difference between the heights of the building and the
lamp post.

Solution 33

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance 

Chapter 14 – Height and Distance Exercise MCQ

Question 1

If the height of a vertical pole is equal to the length of its shadow on the ground, the angle of elevation of the sun is

(a) 0

(b) 30

(c) 45

(d) 60

Solution 1

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 2

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

(a) 30

(b) 45

(c) 60

(a) 75

Solution 2

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 3

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

(a) 45

(b) 30

(c) 60

(d) 90

Solution 3

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 4

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

(a) 60

(b) 45

(c) 30

(b) 90

Solution 4

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 5

The shadow of a 5-m-long stick is 2 m long. At the same time, the length of the shadow of a 12.5-m-high tree is

(a) 3 m

(b) 3.5 m

(c) 4.5 m

(d) 5 m

Solution 5

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 6

A ladder makes an angle of 60 with the ground when placed against a wall. If the foot of the ladder is 2 m away from the wall, the length of the ladder is

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 6

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 7

A ladder 15 m long just reaches the top of a vertical wall. If the ladder makes an angle of 60 with the wall then the height of the wall is

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 7

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 8

From a point on the ground, 30 m away from the foot of a tower the angle of elevation of the top of the tower is 30°. The height of the tower is

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 8

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 9

The angle of depression of a car parked on the road from the top of a 150-m-high tower is 30°. The distance of the car from the tower is

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 9

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 10

A kite is flying at a height of 30 m from the ground. The length of string from the kite to the ground is 60 m. Assuming that there is no slack in the string, the angle of elevation of the kite at the ground is

(a) 45

(b) 30

(c) 60

(a) 90

Solution 10

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 11

From the top of a cliff 20 m high, the angle of elevation of the top of a tower is found to be equal to the angle of depression of the foot of the tower. The height of the tower is

(a) 20 m

(b) 40 m

(c) 60 m

(d) 80 m 

Solution 11

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 12

If a 1-5-m-tall girl stands at a distance of 3 m from a lamp post and casts a shadow of length 4.5 m on the ground, then the height of the lamp post is

(a) 1.5 m

(b) 2 m

(c) 2.5 m

(d) 2.8 m

Solution 12

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 13

The length of the shadow of a tower standing on level ground is found to be 2x metres longer when the sun’s elevation is 30 than when it was 45. The height of the tower is

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 13

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

 

 

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 14

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

(a) 30

(b) 45

(c) 60

(d) 90

Solution 14

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 15

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 15

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 16

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 16

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 17

The tops of two towers of heights x and y, standing on a level ground subtend angles of 30 and 60 respectively at the centre of the line joining their feet. Then, x : y is

(a) 1 : 2

(b) 2 : 1

(c) 1 : 3

(d) 3 : 1

Solution 17

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 18

The angle of elevation of the top of a tower from a point on the ground 30 m away from the foot of the tower is 30. The height of the tower is

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 18

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 19

The string of a kite is 100 m long and it makes an angle of 60 with the horizontal. If there is no slack in the string, the height of the kite from the ground is

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 19

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 20

If the angles of elevation of the top of a tower from two points at distances a and b from the base and in the same straight line with it are complementary then the height of the tower is

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 20

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 21

On the level ground, the angle of elevation of a tower is 30. On moving 20 m nearer, the angle of elevation is 60. The height of the tower is

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 21

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 22

In a rectangle, the angle between a diagonal and a side is 30 and the length of this diagonal is 8 cm. The area of the rectangle is ,

 R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 22

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 23

From the top of a hill, the angles of depression of two consecutive km stones due east are found to be 30 and 45. The height of the hill is

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 23

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 24

If the elevation of the sun changes from 30 to 60 then the difference between the lengths of shadows of a pole 15 m high, is

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Solution 24

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

Question 25

An observer 1.5 m tall is 28.5 m away from a tower and the angle of elevation of the top of the tower from the eye of the observer is 45. The height of the tower is

(a) 27 m

(b) 30 m

(c) 28.5 m  

(d) none of these

Solution 25

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

R-s-aggarwal-and-v-aggarwal Solutions Cbse Class 10 Mathematics Chapter - Height And Distance

 

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