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Asked in PPSC, FPSC and other one-paper exams (compiled from unofficial resources).

A and B together can complete a piece of work in 12 days. A alone can complete the same work in 20 days. In how many days can B alone complete the work?

  1. A.30 days
  2. B.40 days
  3. C.45 days
  4. D.60 daysCorrect answer

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Quick fact: B alone can complete the work in 60 days.

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