Question

How many bricks will be needed to build a wall of $8m\times 5m\times 24cm$, where each brick measures $20cm\times 10cm\times 6cm$?

• A. 8000

Answer 1

The correct option is A 8000
Dimensions of each brick is $25cm\times 11.25cm\times 6cm$
SO, Volume of each brick = 20~ cm $\times 10cm\times 6cm$ = 1200 cu. cm

Dimensions of wall is $8m\times 5m\times 24cm$
So, Volume of the wall = 800~ cm $\times 500cm\times 24cm$ = 9,600,000 cu. cm

Number of bricks = Volume of wall $÷$ Volume of 1 brick = 9,600,000 cu. cm $÷$ 1200 cu. cm = 8000 bricks