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      Question

      Suman alone can complete a work in 40 days. Pooja is twice

      as efficient as Suman. Find the percentage of work completed by Suman and Pooja together in 8 days.
      A 43% Correct Answer Incorrect Answer
      B 60% Correct Answer Incorrect Answer
      C 80% Correct Answer Incorrect Answer
      D 75% Correct Answer Incorrect Answer

      Solution

      ATQ,

      Let the efficiency of Suman = x units/day

      Total work = 40x units

      Efficiency of Pooja = x Γ— 2 = 2x units/day

      Work done by Suman and Pooja together in 8 days = (x + 2x) Γ— 8 = 24x units

      Percentage of work done = (24x / 40x) Γ— 100 = 60%

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