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A sum of money is sufficient to pay A's wages for 21 days and B's wages for 28 days. The same money is sufficient to pay the wages of both for ?
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- 241/2 days
- 12 days
- 121/4 days
- 14 days
Correct Option: B
A's 1 day's work = 1/21
B's day's work = 1/28
∴ Same money is sufficient to pay the wages of both for
= 1 / [(1/21) + (1/28)] = (21 x 28) / (21 + 28)
= (21 x 28) / 49
= 3 x 4 = 12 days
