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S.chand books class 8 maths solution chapter 25 Areas of Rectilinear Figures exercise 25 D

EXERICSE 25 D
1.Find the area of the following trapezium whose dimensions are:
(i) Height=10cm
Parallel sides=6cm and 8cm

(ii) Height=4cm
Parallel sides=6.4cm and 4.6cm

(iii) Height=8.4cm
Parallel sides=15cm and 9.2cm

(iv) Height=7cm
Parallel sides=12cm and 16cm

2.Find the height of a trapezium. whose sum of the lengths of the bases is 31 cm and whose area is 124 cm^2

3.The ratio of the length of the parallel sides of a trapezium is 3:2 . The shortest distance between them is 15cm . If the area of the trapezium is 450cm^2 , what is the sum of the lengths of the parallel sides ?

4.The difference between two parallel sides of a trapezium is 8cm . The perpendicular distance between them is 24m . Find the lengths of the two parallel sides , if the area of the trapezium is 312m^2

5.In the given diagram, CDE is an isosceles triangle with an area of 24cm^2. If AB=8cm and AD=12cm , calculate the arrea of the trapezium ABED

6.The following figure shows a parallelogram and a trapezium whose areas are equal. Find the value of ‘a’

7.Two parallel sides of an isosceles trapezium are 16cm and 24cm respectively. If the lengths of each non-parallel side is 5cm, find the area of trapezium.

8.A grassy area is in the shape of a trapezoid whose bases measures 150m and 100m and the height is 52m . A 3m walkwway is constructed inside this grassy area which runs perpendicular from the two bases. Calculate the area of the grassy patches of land after the construction of this walkway.

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