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Q:

Pipes A and B together can fill a tank in 16 hours, whereas pipe C alone can empty the full tank in 24 hours. A and B were opened together for 10 hours and then closed. Pipe C was then opened. The tank will now be emptied by C in:

  • 1
    18 hours
  • 2
    14 hours
  • 3
    16 hours
  • 4
    15 hours
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Answer : 4. "15 hours"

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