Page 352 - Math Smart - 7

This is a cube. Calculate the volume of this cube.
Ail the edges of a cube
Solution
are of the same length.
V=lbh
=4x4x4
= 64 m^
4 m
The volume of the cube is 64 m^.
Try and Apply!

Write down the dimensions
The cube has an edge of 12 cm. Find its volume.
of a cuboid that you can build
12 cm
using Solution
a) forty-eight Icm^ blocks. Volume of cube = Edge x Edge x Edge
b) twenty-three Icm^ blocks. = 12 X 12 X 12
= 1728 cm^
All the blocks must be used. Is
this possible? The volume of the cube is 1728 cm^.

We derive the formula for the volume of a cube is as / x / x /.
Volume of a cube = Edge x Edge x Edge
= / X / X / m
= /^
Check My
Understanding

O The solid is made up of 1-m cubes.

Find the volume of the solid.

© The cuboid has a length of 9 cm, a breadth of 5 cm and a height of 8 cm. 8 9 cm

Find the volume of the cuboid.
5 cm
@ The cubical block of cheese has an edge of 8 cm. 8 cm

Find the volume of the cheese block.

O The box, in the shape of a cuboid, measures 20 cm by 15 cm by 10 cm. 10 cm
Find the capacity of the box.
W 20 cm

© The cuboid is 11 cm long, 8 cm wide and 7 cm high. 7 cm
Find the volume of the cuboid.
8 cm
11 cm
O The block of clay has an edge of 14 cm.
Find the volume of the clay block.
14 cm

UNIT 15 I Measuring Time, Area, Perimeter and Volume