The number of bricks, which will be required to make a wall which is 8m long, 6m high and 22.5 cm thick if each brick measures 25 cm ×11.25 cm × 6 cm is

Correct option is C

Given:

Length of wall = 8 m

Height of wall = 6  m

Thickness of wall = 22.5 cm

Size of one brick = 25cm × 11.25cm × 6 cm

Formula Used:

Volume of cuboid = $$\text{Length} \times \text{Breadth} \times \text{Height}$$​​

Solution:

8 m = 800 cm

6 m = 600 cm

Thickness = 22.5 cm

Volume of wall = $$800 \times 600 \times 22.5 = 10,800,000 \text{ cm}^3$$​​

Volume of one brick = $$25 \times 11.25 \times 6 = 1687.5 \text{ cm}^3$$​​

Number of bricks = $$\frac{10,800,000}{1687.5}$$​ = 6400