Multiple Choice Questions on P does half as much work as Q does in 1 5 of the time Both working together can take 20 days to comp........... for SSC CGL Exam Preparation

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Multiple Choice Questions

P does half as much work as Q does in 1 5 of the time Both working together can take 20 days to comp...........

Quantitative Aptitude (CGL) Time and work
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    P does half as much work as Q does in 1/5 of the time. Both working together can take 20 days to complete the work. No of days P take to complete the work alone.

    28

    Correct Answer

    32

    Incorrect Answer

    34

    Incorrect Answer

    35

    Incorrect Answer
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    Explanation:

    Answer & Solution
    Answer – a) 28
    Solution:
    Let Q complete the work in ‘T’ time. In one day, work done by Q is equal to 1/T. In five days, work done by Q is 5/T.
    It is given that P does half as much work in 1/5 of the time. So P does 1/2 of the work. i.e 5/2T
    So (1/T + 5/2T) = 1/20. So T = 70.
    So P takes 2T/5 days. (2*70)/5 = 28days.

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