Question

How many bricks, each measuring 25 cm × 11.25 cm × 6 cm, will be needed to build a wall of 80 m × 60 m × 22.5 cm?
1. 5600
2. 6000
3. 6400
4. 7200

Answer 1

Correct Answer - Option 3 : 6400

Given:

The dimension of the wall is 80 m × 60 m × 22.5 cm

Concept:

The volume of cuboid = Length × Breadth × Height

Calculation:

⇒ The volume of brick = 25 × 11.25 × 6 = 1678.5 cm³

⇒ The volume of the wall = 80 × 60 × 22.5 = 10800000 cm³

⇒ The number of bricks = 10800000/1678.5 = 6400

∴ The required result will be 6400.