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    Question

    Meena alone can complete a work in 20 days. Ritu is twice

    as efficient as Meena. Find the percentage of work completed by Meena and Ritu together in 4 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 Meena = x units/day

    Total work = 20x units

    Efficiency of Ritu = x × 2 = 2x units/day

    Work done by Meena and Ritu together in 4 days = (x + 2x) × 4 = 12x units

    Percentage of work done = (12x / 20x) × 100 = 60%

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