If 20 persons can clean 20 floors in 20\text{ days}, then in how many days can 16 persons clean 16 floors?
- A. 25 days
- B. 24 days
- C. 20 days ✓
- D. 16 days
Correct Answer: C. 20 days
Explanation
Using the relation \frac{M_1 D_1}{W_1} = \frac{M_2 D_2}{W_2}, we get \frac{20 \times 20}{20} = \frac{16 \times D_2}{16}. Simplifying gives D_2 = 20\text{ days}.
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