Quantitative Aptitude • Time, Speed & WorkEasy
30 workers can build a wall in 25 days. How many days will 5 workers take to build the same wall, working at the same rate?
A. 750 days
B. 4.17 days
C. 150 days✓ Correct Answer
D. 50 days
💡 Solution & Explanation
The total work is 30 × 25 = 750 worker-days. More workers means fewer days, so divide: 750 ÷ 5 = 150 days. Multiplying instead (4.17 days) would mean more workers take longer, which cannot be right.
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