20 men are supposed to complete a work in 10 days. After working for 5 days, they realise that only one-fourth of the work is done. How many more men they need to employ to finish the work on time?
- A. 40 ✓
- B. 30
- C. 20
- D. 15
Correct Answer: A. 40
Explanation
Using M_1 D_1 / W_1 = M_2 D_2 / W_2, we substitute values: (20 \times 5) / (1/4) = (M_2 \times 5) / (3/4). Solving yields total men required M_2 = 60. More men needed = 60 - 20 = 40.
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