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Q:

X, Y and Z take 18 days to complete a piece of work. If X works alone he finishes the work in 36 days and if Y works alone he finishes it in 60 days. How long will it take Z to complete the work alone?

  • 1
    78 days
  • 2
    90 days
  • 3
    96 days
  • 4
    114 days
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Answer : 2. "90 days"

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