## EXERCISE 25 B

**1.Work out the volume of each cuboid.**

(i) fig

(ii) fig

(iii) fig

**2. Complete the following table. (Measurements are in cm)**

(i) | (ii) | (iii) | (iv) | (v) | (vi) | |

Length | 4 | 2 | 7 | ? | 16 | ? |

Breadth | 3 | 6 | 3 | 9 | ? | 28 |

Height | 5 | 8 | 4 | 12 | 18 | 24 |

Volume | ? | ? | ? | 1296 | 4032 | 26208 |

**3. Find the volume of a cube with the given side.**

(i) 3 cm (ii) $\dfrac{1}{2}~cm$ (ii) 1.2 m (iv) 2.5 m

**4.Find the side of the cubes whose volumes are**

(i) 216 m^{2} (ii) 512 cm^{3} (iii) 1728 cm^{3} (iv) 2197 m^{3}

**5.The bottom of a tank measures 25m × 20 m. Find its depth, if it contains 2000 m ^{3} water.**

**6. Find the volume of a cube, one face of which has an area of 64 cm ^{2}**

**7.The volume of a soap cake is 160 cm ^{3}. Its length and width are 10 cm and 5 cm. Find its height.**

**8. lf 60 cm ^{3} of a metal weighs 1 kg, find the weight of a block of the same metal of the size 20 cm by 12 cm by 5 cm.**

**9. A Solid cube of edge 20 cm is melted and cast into a cuboid whose base measure 25 cm by 20 cm. Find the height of the cuboid .**

**10. Find the number of bricks 90 cm by 5 cm by 4 cm , contained in a crate measuring 27 cm by 15 cm by 8 cm .**

**11. The inside measurements of a cardboard box are $1\dfrac{1}{2}~m$ by $\dfrac{3}{4}~m$ by 60 cm . How many book of size , 20 cm by 10 cm by 7.5 cm each can be arranged in the box ? **