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Quantitative Aptitude

Time & Work

A can do a pi...

Question

A can do a piece of a work in 7 days, A and B can do the work together in 6 days. If B alone does the work how many days does he require?

A

40

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B

42

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C

43

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D

45

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E

48

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Solution

The correct option is B
42

Let the time taken by B be ‘x’

$\frac{1}{x} = \frac{1}{6} - \frac{1}{7} = \frac{1}{42}$

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