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6th Class Mathematics Related to Competitive Exam Question Bank Time and Work

  • question_answer
    X and Y together can do a piece of work in 8 days, which X alone can do in 12 days. In how many days can Y do the same work alone?

    A) 12 days                       

    B) 24 days

    C) 36 days           

    D)          16 days

    Correct Answer: B

    Solution :

         \[\frac{1}{12}+\frac{1}{x}=\frac{1}{8}\] \[\frac{1}{x}=\frac{1}{8}-\frac{1}{12}=\frac{1}{24}\] \[\therefore \,\,x=24\] days.


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