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1. 15 men take 21 days of 8 hours each to do a piece of work. How many days of 6 hours each would 21 women take , if 3 women do as much work as 2 men ?
- A. 18
- B. 18
- C. 18
- D. 18
Answer: Option D
Explanation:
3 women can do as much work as 2 men
∴ efficiency of women to do a piece of work, e2 = (1/3)
∴ efficiency of men to do a piece of work, e1 = (1/2)
We know,
Total work done = (no. of men or women) * (no. of days) * (no. of hours) * (efficiency)
Therefore,
m1 * d1 * h1 * e1 = m2 * d2 * h2 * e2
or, 15 * 21 * 8 * (1/2) = 21 * d2 * 6 * (1/3)
or, d2 = 30 days .
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