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\\November 3, 2023 10:30 AM Surender Prajapati Proof 5 Reader _________________________ Date: ___________________74

Practice Time 12D

1. Find the volume of the following solids by counting number of unit cubes.
(a) (b) (c) (d)

2. Find the volume of these objects.

(a) (b) (c)
1 cm
8.5 cm 12 cm

5 cm
6 cm 2.5 cm 12 cm 12 cm
15 cm
3. Find the volume of the cuboids whose dimensions are:
(a) Length = 11 cm, Breadth = 12 cm, Height = 8 cm

(b) Length = 5 m, Breadth = 2.5 m, Height = 2 m
(c) Length = 180 mm, Breadth = 78 mm, Height = 45 mm
(d) Length = 4.2 m, Breadth = 1.8 m, Height = 60 cm
4. Find the volume of the cube whose each side is:
(a) 18 mm (b) 12 cm (c) 3 m (d) 1.05 cm (e) 28 mm

5. Complete the following table for a cuboid.

Length Breadth Height Volume
(a) 3.5 m 5 m 2 m
(b) 5 cm 4 cm 140 cu. cm
(c) 12 cm 7 cm 420 cu. cm
(d) 9 m 10 m 1080 cu. m
6. The dimensions of a brick are 24 cm, 12 cm and 8 cm. Find its volume.

7. The side of a cubical tank is 3.2 m. Find its volume.
8. Find the height of a cuboidal box of volume 196 cubic cm whose length and breadth
are 14 cm and 7 cm, respectively.

Mental Maths
Some shapes are drawn on squared paper as shown below.

F
A B C
D E
G I
H J K

The areas of the shapes are given in the table. Identify them.
Area (in sq. units) 15 7.5 18 9 6

Shapes

240 Mathematics-5