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A and B together can do a piece of work in 12 days, while B alone can do finish it in 30 days. A alone can finish the work in


A) 15 days

B) 18 days

C) 20 days

D) 25 days

Correct Answer:
C) 20 days

Description for Correct answer:

(A + B)'s 1 day's work = 1/12

B's 1 day's work = 1 /30

A's 1 day's work = \( \Large\frac {1}{12}- \frac{1}{30} = \frac{5-2}{60} = \frac{1}{20}\)

A alone can finish the work in 20 days.


Part of solved Time and work questions and answers : >> Aptitude >> Time and work




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