Question

How many bricks, each of size 25 cm $\times$ 13.5 cm $\times$ 6 cm, will be required to build a wall 8 m long, 5.4 in high and 33 cm thick?

Answer 1

Length of wall (l)=8 m=800 cm

height (h)=5.4 m =540 cm

Width (b)=33 cm

$\therefore$ Volume of wall $=l\times b\times h$

$=800\times 540\times 33c{m}^3$

$=14256000c{m}^3$

Volume of one brick $=25\times 13.5\times 6c{m}^3$

$=2025c{m}^3$

$\therefore$ No. of bricks $=\frac{14256000}{2025}=7040$