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Railways Sample Paper RRB (Group D) Sample Test Paper-6

  • question_answer
    A can do a piece of work in 20 days which B can do in 12 days. B worked at it for 9 days. A can finish the remaining work in:

    A)  5 days 

    B)  7 days

    C)  11 days           

    D)  3 days

    Correct Answer: A

    Solution :

    [a] B's 1 day work\[=\frac{1}{12}\] B's 9 day's work \[=\frac{9}{12}=\frac{3}{4}\] Remaining work \[=1-\,\frac{3}{4}=\frac{1}{4}\] \[\therefore \] A can finish this work in \[\frac{20}{4}\] days = 5 days


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