Question

How many bricks will be required to build a wall of 8 m long, 6m height and 22.5 cm if each brick measures 25 cm by 11.25 cm by 6 cm?

Answer 1

The volume of a wall of measures 8 m × 22.5 cm × 6 m

(V₁) = l₁b₁h₁

= 8 m × 22.5 cm × 6 m 

= 800 cm × 22.5 cm × 600 cm 

The volume of a brick each measures 25 cm × 11.25 cm × 6 cm

(V₂) = l₂b₂h₂

= 25 × 11.25 × 6 cm³

∴ The no. of bricks will be required

= 32 × 2 × 100 = 6400