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SSC Sample Paper SSC CGL - Sample Paper-4

  • question_answer
    A and B can together finish a work in 30 days. They worked together for 20 days and then B left. After another 20 days, A finished the remaining work. In how many days A alone can finish the job?

    A)  50                               

    B)  60

    C)  48                               

    D)  54

    Correct Answer: B

    Solution :

    (A + B)?s 1 day?s work \[=\frac{1}{30}\] (A + B)?s 20 day?s work \[=\frac{20}{30}=\frac{2}{3}\] Remaining work \[=1-\frac{2}{3}=\frac{1}{3}\] Now, \[\frac{1}{3}\] part of work is done by A in 20 days. \[\therefore \] Whole work will be done by A alone in \[20\times 3=60\] days


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