Page 181 - Start Up Mathematics_5

Example 19: Find the volume of the cuboid shown in the
given figure. 3 cm

Solution: Length = 8 cm, Breadth = 5 cm, Height = 3 cm

Volume = Length × Breadth × Height
5 cm
= 8 cm × 5 cm × 3 cm
8 cm
= 120 cm 3

EXERCISE 13.4

1. Find the volume of a cuboid whose dimensions are given below.

(a) Length = 11 cm, Breadth = 8 cm, Height = 5 cm
(b) Length = 9 m, Breadth = 6 m, Height = 4 m

(c) Length = 4.5 cm, Breadth = 3 cm, Height = 1.5 cm

(d) Length = 5 dm, Breadth = 22 cm, Height = 10 cm
2. Find the volume of a cube whose side is given below.

(a) 4 cm (b) 6 m (c) 2.5 dm

(d) 12 cm (e) 20 cm
3. The volume of an iron box is 140 m . If the breadth and height of the box are 7 m and
3
2 m respectively, find its length.

4. The volume of a wooden block is 324 cm . If the length and height of the block are
3
1.2 dm and 3 cm respectively, find its width.

LET’S EVALUATE

1. Find the perimeter and area of a rectangular field whose length and breadth are
17.5 m and 8.4 m, respectively.

2. Devesh has a square chart paper of side 20 cm. He wishes to cut small squares each
of side 5 cm from this chart. How many squares will Devesh have?

3. The perimeter of a square-shaped box is 72 cm. What is its area?
4. Find the volume of a cuboidal suitcase whose length is 40 cm, breadth is 32 cm and
height is 2.8 dm.

5. Find the volume of a cube whose side is 7.5 dm.

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