MCQ
How many bricks will be required to construct a wall $8m$ long, $6m$ high and $22.5\ cm$ thick if each brick measures $(25\ cm × 11.25\ cm × 6\ cm)?$
- ✓$6400$
- B$4800$
- C$5600$
- D$5200$
✓
Answer
Correct option: A.
$6400$
Volume of a cuboid $=$ Length $×$ Breadth $×$ height
$1m = 100$
Volume of wall $= 8m × 6m × 0.225m = 10.8m^3$
Volume of a brick $= 0.25m × 0.1125m × 0.06m = 0.0016875m^3$
No. of bricks $=\frac{\text{Volume of wall }}{\text{Volume of a brick }}=\frac{10.8}{0.0016875}=6400$
$1m = 100$
Volume of wall $= 8m × 6m × 0.225m = 10.8m^3$
Volume of a brick $= 0.25m × 0.1125m × 0.06m = 0.0016875m^3$
No. of bricks $=\frac{\text{Volume of wall }}{\text{Volume of a brick }}=\frac{10.8}{0.0016875}=6400$
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