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      Question

      A, B and C together can do a work in p/13 days, A and B

      together can do the work in p/10 days and B alone can do the work in p/4 days. If C takes 20 days more than A to complete the work alone, then find the value of p.
      A 520 Correct Answer Incorrect Answer
      B 115 Correct Answer Incorrect Answer
      C 120 Correct Answer Incorrect Answer
      D Can't be determined Correct Answer Incorrect Answer
      E 160 Correct Answer Incorrect Answer

      Solution

      ATQ,

      Given Work Rates:

      Find Work Rates:

      Use the Given Condition:

      Solve for p: p = 120

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