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    Question

    Raj alone can complete a work in 25 days. Mohan is five

    times as efficient as Raj. Find the percentage of work completed by Raj and Mohan together in 5 days.
    A 43% Correct Answer Incorrect Answer
    B 60% Correct Answer Incorrect Answer
    C 80% Correct Answer Incorrect Answer
    D 120% Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the efficiency of Raj = x units/day

    Total work = 25x units

    Efficiency of Mohan = x × 5 = 5x units/day

    Work done by Raj and Mohan together in 5 days = (x + 5x) × 5 = 30x units

    Percentage of work done = (30x / 25x) × 100 = 120%

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