New Enroll for RBI, PFRDA & NABARD Intro Class! April 18 at 9:15 PM

    Question

    'Pawan' can complete a task alone

    in 63 days. However, when working together with 'Bhanu,' they finish the same task in 42 days. How many days would it take for 'Bhanu' to complete the task alone?
    A 126 days Correct Answer Incorrect Answer
    B 120 days Correct Answer Incorrect Answer
    C 135 days Correct Answer Incorrect Answer
    D 140 days Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the total work be 126 units (LCM of 63 and 42) Efficiency of 'Pawan' = (126/63) = 2 units/day Combined efficiency of 'Pawan' and 'Bhanu' = (126/42) = 3 units/day So, efficiency of 'Bhanu' = 3 - 2 = 1 unit/day Therefore, required time = (126/1) = 126 days

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