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A and B can do a piece of work in 6 and 12 days, respectively. They (both) will complete the work in how many days?


A) 9 days

B) 18 days

C) 6 days

D) 4 days

Correct Answer:
D) 4 days

Description for Correct answer:
A's 1 day's work = 1 / 6
B's 1 day's work = 1 / 12

(A + B)'s 1 day's work =\( \Large\frac{1}{6} + \frac{1}{12} \)

\( \Large\frac{2 + 1}{12} = \frac{3}{12} = \frac{1}{4}\)

Hence, both will complete the work in 4 days.

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




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