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SSC Sample Paper SSC CGL - Sample Paper-11

  • question_answer
    A is thrice as good a workman as B and therefore, able to finish a job in 60 days less than B. Working together they will do it in

    A) 20 days            

    B) \[22\frac{1}{2}\] days

    C) 25 days            

    D) 30 days

    Correct Answer: B

    Solution :

    Let A can finish the whole work in x days. \[\therefore \] B can finish the same work in 3x days. According to question,             \[3x-x=60\] \[\therefore \]      \[x=30\,\,\text{days}\] \[\therefore \] A can finish the work in 30 days and B can finish the same work in 90 days. \[\therefore \] (A + B)?s one day's work \[=\frac{1}{30}+\frac{1}{90}=\frac{4}{90}\] \[\therefore \]  (A + B)?s can finish the complete work in \[=\frac{90}{4}=22\frac{1}{2}\,\text{days}\text{.}\]


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