Question

how many bricks of size 22.5 cm by 10cm by 7.5 cm required to construct a wall 9 meters long 1.5 meters high and 32.5 cm thick

Answer 1

Given,
Dimensions of brick = (22.5*10*7.5)cm³
Dimensions of wall = (900*150*32.5)cm³
Now,
No of bricks=(900*150*32.5)/(22.5*10*7.5)
= 4387500/1687.5
= 2600 bricks

Hope this helps you!

Answer 2

volume of 1 brick = 22.5cm× 10cm× 7.5cm =1687.5 cm3
volume of wall= 9m × 1.5 m × 32.5 cm
= 900cm× 150cm × 32.5 cm
= 4387500cm3
no. of bricks
= (volume of wall) ÷ ( volume of 1 brick)
= 4387500÷1687.5
=2600 bricks.