Question

How many bricks, each measuring 25 cm by 11.25 cm by 6 cm, will be needed to build a wall of 8 m by 6 m by 22.5 cm?

Answer 1

Wall dimensions = 8 m by 6 m by 22.5 cm
= 800 cm by 600 cm by 22.5 cm$\mathrm{Total}\mathrm{number}\mathrm{of}\mathrm{bricks}=\frac{\mathrm{Volume}\mathrm{of}\mathrm{the}\mathrm{wall}}{\mathrm{Volume}\mathrm{of}1\mathrm{brick}}=\frac{800\mathrm{cm}\times 600\mathrm{cm}\times 22.5\mathrm{cm}}{25\mathrm{cm}\times 11.25\mathrm{cm}\times 6\mathrm{cm}}=6400\mathrm{bricks}$