Question

How many bricks each 25m long, 16m wide and 7.5cm thik will be required to build a terrace 5m long, 3m broad and 80cm high?

Answer 1

$\textbf{\huge{ANSWER:}}$

No. of bricks = $\frac{Volume\:\:of\:\:Terrace}{Volume\:\:of\:\:brick}$

Volume of terrace = 25 × 16 × $\frac{7.5}{100}$ (m)

=》 4 × 16 × 7.5 (m)

=》 480 $m^{3}$

Volume of brick = 5 × 3 × $\frac{80}{100}$ (m)

=》 3 × 4 (m)

=》 12 $m^{3}$

No. of bricks = $\frac{480}{12}$

=》 $\textbf{40 bricks}$