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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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