Practice Test Discussion


A and B can do a piece of work in 60 days and 75 days, respectively. Both begin together but after a certain time 'A' leaves off. In such case 'B' finishes the remaining work in 30 days. After how many days did 'A' leave?

  • Explanation

    Given that,

    a=60 days, b=75 days, x=30, T=?

    According to the formula,

    =(b+x)aa+b=(75-30)×6060+75=45×60135=20 days

     Hence option C is the correct.

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