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Question
A wall 9 m long, 6 m high and 20 cm thick, is to be constructed using bricks of dimensions 30 cm, 15 cm, and 10 cm. How many bricks will be required?
Solution
Length of the wall = 9 m = 9 x 100 cm = 900 cm
Height of the wall = 6 m = 6 x 100 cm = 600 cm
Breadth of the wall = 20 cm
Volume of the wall = 900 x 600 x 20 cm3 = 10800000 cm3
Volume of one Brick = 30 x 15 x 10 cm3 = 4500 cm3
Number of bricks required to construct the wall = `"Volume of wall"/"Volume of one brick"`
`10800000/4500`
= 2400
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