By working 9 hours a day, 12 people complete a work in 25 days. In how many days will 15 people complete the same work working 6 hours a day?
A28 days
B29 days
C30 days ✓ Correct
D32 days
Correct answer: (C) 30 days
Explanation
It takes 30 days.
Use men x days x hours as constant work.
12 x 25 x 9 = 15 x D x 6.
2700 = 90 x D.
D = 30 days.
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