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      Question

      Anu can finish 25% of an assignment in 10 days, whereas

      Tanya can do 30% in 12 days. Anu works on it for 16 days and leaves. How long will Tanya take to wrap up the remaining work?
      A 48 days Correct Answer Incorrect Answer
      B 24 days Correct Answer Incorrect Answer
      C 32 days Correct Answer Incorrect Answer
      D 72 days Correct Answer Incorrect Answer

      Solution

      ATQ,

      Time taken by Anu to complete whole work = (10 / 0.25) = 40 days

      Time taken by Tanya to complete whole work = (12 / 0.30) = 40 days

      Let the total work be 120 units (LCM of 40 and 40)

      Efficiency of Anu = (120 / 40) = 3 units/day

      Efficiency of Tanya = (120 / 40) = 3 units/day

      Work completed by Anu in 16 days = 16 Ă— 3 = 48 units

      Remaining work = 120 - 48 = 72 units

      Therefore, required time = (72 / 3) = 24 days

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