Question

How many bricks needed each 24 cm long and 12.5 cm width and 8 cm thick will be required to build a wall. 18 m long 2.5 cm hight and 40 cm thick

Answer 1

no of bricks=vol of wall / vol of 1 brick
$= \frac{1800 \times 2.5 \times 40}{24 \times 12.5 \times 8} = 75$
hence 75 bricks are needed
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