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SSC Sample Paper SSC CGL - Sample Paper-9

  • question_answer
    A and B together can be do a piece of work in 5 days and AB alone can do it in 8 days. B alone can do the same piece of  work in                                          

    A)  111 days                     

    B)  12 3 days

    C)  131 days         

    D)  164 days

    Correct Answer: C

    Solution :

    (A + B)?s 1 day's work \[=\frac{1}{5}\] A's 1 day's work \[=\frac{1}{8}\] \[\therefore \] B's 1 day's work \[=\frac{1}{5}-\frac{1}{8}\]             \[=\frac{8-5}{40}=\frac{3}{40}\] \[\therefore \] B alone will complete the work in \[\frac{40}{3}\]\[=13\frac{1}{3}\,\text{days}\text{.}\]


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