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A can do a piece of work in x days and B can do the same work 3x days. To finish the work together they take 12 days. What is the value of x?


A) 8

B) 10

C) 12

D) 16

Correct Answer:
D) 16

Description for Correct answer:

A's 1 day's work A = 1 / x

B's 1 day's work B = 1 / 3x

(A + B)'s 1 day's work = \( \Large\frac{1}{x} + \frac{1}{3x} = \frac{4}{3x} \)

and given one day work of both A

and B = 1/12

\( \Large\frac{4}{3x} = \frac{1}{12} = > 3x = 48 = > x = 16 \)


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




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