MCQ
How many bricks each measuring $( 25 \ cm \times 11.25 \ cm \times 6 \ cm )$ will be required to construct a wall $( 8 m \times 6 m \times 22.5 \ cm )$?
- A$8000$
- ✓$6400$
- C$4800$
- D$7200$
✓
Answer
Correct option: B.
$6400$
$\text { Volume of walls }=(800 \times 600 \times 22.5) \ cm ^3$
$\text { Volume of } 1 \text { bricks }=(25 \times 11.25 \times 6) \ cm ^3$
$\text { Number of bricks }=\frac{\text { Volume of the walls }}{\text { Volume of } 1 \text { bricks }}$
$=\frac{800 \times 600 \times 22.5}{25 \times 11.25 \times 6}$
$=6400$
$\text { Volume of } 1 \text { bricks }=(25 \times 11.25 \times 6) \ cm ^3$
$\text { Number of bricks }=\frac{\text { Volume of the walls }}{\text { Volume of } 1 \text { bricks }}$
$=\frac{800 \times 600 \times 22.5}{25 \times 11.25 \times 6}$
$=6400$
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