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Railways R.R.C. (Allahabad) Solved Paper Held on 17-11-2013

  • question_answer
    A man can do a piece of work in 5 days, but with the help of his son he can do it in 3 days. In what time can the son do it alone?

    A) 6-5 days                       

    B) 7 days

    C) 7-5 days           

    D) 8 days

    Correct Answer: C

    Solution :

    One day work of the man \[=\frac{1}{5}\,\,part\] One day work of the man and his son \[=\frac{1}{3}\,\,part\] Son's can do in one day \[=\frac{1}{3}-\frac{1}{5}=\frac{2}{15}\] Hence, the son will do in 7-5 days.


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