If the brick size is 25 cm × 12 cm × 9 cm, then how many bricks are required to construct a wall of length 10 m, breadth 22.5 cm and height 6 m?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 5000.
Let n be the number of bricks required
The dimensions of the wall are:
Length = 10 m = 1000 cm, Breadth = 22.5 cm, and Height = 6 m = 600 cm
The volume of the wall = Length × Breadth × Height
⇒ 1000cm × 22.5cm × 600cm
⇒ 13500000 cm3
Now,
⇒ Volume of one brick = 25cm × 12 cm × 9cm = 2700 cm3
Thus,
Number of bricks(n) = Volume of the wall/Volume of one brick
⇒ n = 13500000/2700
⇒ n = 5000
Thus, 5000 bricks are required to construct the wall