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Q:

Three pipes A, B and C can fill a cistern in 10 hours, 12 hours and 15 hours respectively. First A was opened. After 2 hour, B was opened and after 4 hours from the start of A, C was also opened. Find the time in which the cistern is just full.

  • 1
    2 hours
  • 2
    4 hours
  • 3
    2 hours 52 min
  • 4
    5 hours 44 min.
  • 5
    None of these
  • Show Answer
  • Workspace

Answer : 4. "5 hours 44 min."

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