Multiple Choice Questions on A and B working together can finish a piece of work in 12 days while B alone can finishit in 30 days........... for CDS Exam Preparation

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Multiple Choice Questions

A and B working together can finish a piece of work in 12 days while B alone can finishit in 30 days...........

Quantitative Aptitude (CDS) Time and work
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    A and B working together can finish a piece of work in 12 days while B alone can finishit in 30 days. In how many days can A alone finish the work?

    18 days

    Incorrect Answer

    20 days

    Correct Answer

    24 days

    Incorrect Answer

    25 days

    Incorrect Answer
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    Explanation:

    As, A and B together can do the work in 12 days. B alone can do the work in 30 days. So, A can do the work in
    1/12 − 1/30 = 3/60 = 1/20
    i.e. A can do the work in 20 days.

    By: Munesh Kumari
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