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Question
The number of bricks each measuring 50 cm × 30 cm × 20 cm that will be required to build a wall whose dimensions are 5 m × 3 m × 2 m is
Options
1000
2000
3000
5000
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Solution
1000
Explanation;
Hint:
Volume of one brick = 50 × 30 × 20 cm3
Volume of the wall = l × b × h
l = 5 m = 500 cm
b = 3 m = 300 cm
h = 2 m = 200 cm
= 500 × 300 × 200 cm3
No. of bricks
= `"Volume of the wall"/"Volume of one bricks"`
= `(500 xx 300 xx 200)/(50 xx 30 xx 20)`
= 10 × 10 × 10
= 1000 bricks
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