Question

how many bricks of length 12.5 cm,breadth 7.5 cm and height 5 cm are required to build a wall of length 12.5 m height 15 m and breadth 50 cm

Answer 1

1250*1500*50/12.5*7.5*5
=100*10*100/5
=20000
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Answer 2

Let the no. of bricks be x.

volume of x bricks = volume of the wall
x × 12.5 ×7.5 × 5 = 12.5 × 15 ×50 × 100 ×100
x= 200000