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Q:

A pipe can fill a tank in 72 minutes. But there is a leak in the bottom of the tank due to which the tank is filled in 18 minutes more. Find in how many hours the leak can empty a full tank ?

  • 1
    7 hrs
  • 2
    6.5 hrs
  • 3
    9 hrs
  • 4
    6 hrs
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Answer : 4. "6 hrs"

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