Mensuration Practice Test 2

Length of the wall = 13.5 m = 1,350 cm
Height = 6 m = 600 cm
Thickness = 22.5 cm
Volume = 1,350 × 600 × 22.5 = 1,82,25,000 $\mathit{c}{\mathit{m}}^3$
Volume of bricks = 27 × 12.5 × 9 = 3,037.5 $\mathit{c}{\mathit{m}}^3$
Number of bricks = $\frac{\mathrm{volume}\mathrm{of}\mathrm{wall}}{\mathrm{volume}\mathrm{of}\mathrm{bricks}}$
= $\frac{18225000}{3037.5}$ = 6000 bricks.