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Q: A and B can do a piece of work in 12 days. B and C in 15 days and C and A in 20 days. If A, B and C work together, they will completer the work in :

  • 1
    5 days
  • 2
    $$ 7{5\over 6} \ days$$
  • 3
    10 days
  • 4
    $$ 15 {2\over 3} \ days$$
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Answer : 3. " 10 days"

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