Question

How many bricks will be required to construct a wall 8 m long, 6 m high and 22.5 cm thick if each brick measures (25 cm × 11.25 cm × 6 cm)?

Answer 1

Length of the wall = 8 m = 800 cm
Breadth of the wall = 22.5 cm
Height of the wall = 6 m = 600 cm
i.e., volume of wall$=800\times 22.5\times 600{\mathrm{cm}}^3=10800000{\mathrm{cm}}^3$

Length of the brick = 25 cm
Breadth of the brick = 11.25 cm
Height of the brick = 6 cm
i.e., volume of one brick $=25\times 11.25\times 6=1687.5{\mathrm{cm}}^3$

∴ Number of bricks = $\frac{\mathrm{volume}\mathrm{of}\mathrm{the}\mathrm{wall}}{\mathrm{volume}\mathrm{of}\mathrm{one}\mathrm{brick}}$ = $\frac{10800000}{1687.5}=6400$