2020 · Q74
The length, breadth and height of a brick are 20 cm, 15 cm and 10 cm respectively. The number of bricks required to construct a wall with dimensions 45 m length, 0.15 m breadth and 3 m height is
Elementary MathematicsMensuration
- A12450
- B11250
- C6750
- DNone of the above
Explanation
Wall volume = 45*0.15*3 = 20.25 m^3 = 20,250,000 cm^3; one brick = 3000 cm^3. Number of bricks = 20250000/3000 = 6750 - option (C). Check: 6750*3000 = 20,250,000 cm^3, the wall volume.