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Q:

One filling pipe P is three times faster than another filling pipe Q, if P can fill tank in 24 hours, then what is the time taken to completely fill the tank if both the pipes are opened together?

  • 1
    12 hours
  • 2
    18 hours
  • 3
    16 hours
  • 4
    14 hours
  • 5
    None of these
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Answer : 2. "18 hours"

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