How many bricks, each measuring 25 cm x 11.25 cm x 6 cm, will be needed to…
2026
How many bricks, each measuring 25 cm x 11.25 cm x 6 cm, will be needed to build a wall of 8 m x 6 m x 22.5 cm?
- A.
5600
- B.
6000
- C.
6400
- D.
7200
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Correct answer: C
Solution:
Convert all dimensions to centimetres: 8 m = 800 cm, 6 m = 600 cm, thickness = 22.5 cm.
Compute the volume of the wall: 800 × 600 × 22.5 = 10,800,000 cm^3.
Compute the volume of one brick: 25 × 11.25 × 6 = 1,687.5 cm^3.
Divide to find the number of bricks: 10,800,000 ÷ 1,687.5 = 6400.
Answer: 6400 bricks.