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Q:

A and B together can do a piece of work in 12 days, A and C together can do the same work in 15 days. If B and C together can do the same work in 20 days, then in how many days A, B and C together can complete the same work?

  • 1
    8
  • 2
    6
  • 3
    10
  • 4
    9
  • 5
    None of these
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Answer : 3. "10"

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