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SSC Quantitative Aptitude Time And Work Question Bank Work and Time (II)

  • 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. The number of days in which B alone can finish the work is

    A) 54

    B) 60

    C) 50

    D) 48           

    Correct Answer: B

    Solution :

    [b] A + B)'s one day work\[=\frac{1}{30}\] \[\therefore \] (A + B)'s 20 day work\[=\frac{20}{30}=\frac{2}{3}\] The remaining work\[=1-\frac{2}{3}=\frac{1}{3}\] According to the question A finished the remaining work in 20 days


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