New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    Ajay completes half the work done by Rohit in 5/6 of the

    time. If they together finish the work in 18 days, how much time will Rohit take to complete the work?
    A 10.5 days Correct Answer Incorrect Answer
    B 28.8 days Correct Answer Incorrect Answer
    C 45.5 days Correct Answer Incorrect Answer
    D None of these Correct Answer Incorrect Answer

    Solution

    Let time taken by Rohit to complete the work = t days

    Ajay takes 2 × (5t/6) = 10t/6 = 5t/3 days.

    Efficiency of Rohit = 1/t,

    Efficiency of Ajay = 3/5t.

    Total efficiency = 1/t + 3/5t = 1/18
    Image
    Solving for t , we get t = 28.8 days .

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