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10th Class Mathematics Pair of Linear Equations in Two Variables Question Bank MCQs - Pair of Linear Equations in Two Variables

  • question_answer
    A can do a piece of work in 24 days. If B is \[60%\] more efficient than A, then the number of days required by B to do the twice as Large as the earlier work is:

    A) 24

    B) 36

    C) 15

    D) 30

    Correct Answer: D

    Solution :

    [d] Work ratio of \[A:B=100:160\] or \[5:8\]
    Time ratio \[=8:5\] or \[24:15\]
    If A takes 24 days, B takes 15 days. Hence, B takes 30 days to do double the work.


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