Multiple Choice Questions on Prakash is twice as fast as sumit and therefore Prakash is able to finish the work in 30 days less t........... for RBI Grade B Exam Preparation

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Multiple Choice Questions

Prakash is twice as fast as sumit and therefore Prakash is able to finish the work in 30 days less t...........

Quantitative Aptitude (RBI Grade B) Time and work
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    Prakash is twice as fast as sumit and therefore Prakash is able to finish the work in 30 days less than sumit. Find the time in which they can complete the work when both are working together?

    25 days

    Incorrect Answer

    20 days

    Correct Answer

    30 days

    Incorrect Answer

    35 days

    Incorrect Answer
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    Explanation:

    Let sumit take x days then Prakash will take x/2 days to complete the work.
    X – X/2 = 30, X = 60
    1/60 + 1/30 = 1/d so, we will get d= 20 days

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