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Q: A and B can do a piece of work in 72 days. B and C can do it in 120 days. A and C can do it in 90 days. In how many days all three together can do the work ?

  • 1
    80 days
  • 2
    100 days
  • 3
    60 days
  • 4
    150 days
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Answer : 3. " 60 days"

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