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Q: An electric pump can fill a tank in 3 hours. Because of a leak in the tank, it took 3 ½ hours to fill the tank. The leak can drain out all the water of the tank in……

  • 1
    10 ½ hrs.
  • 2
    12 hrs.
  • 3
    21 hrs.
  • 4
    24 hrs.
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Answer : 3. "21 hrs."

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