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      Question

      A Tank has two pipes one can fill it with water in 16

      hours and other can empty it in 10 hours. In how many hours will the Tank be emptied if both the pipes are opened together when 3/8th of the Tank is already filled with water?
      A 20 hours Correct Answer Incorrect Answer
      B 15 hours Correct Answer Incorrect Answer
      C 24 hours Correct Answer Incorrect Answer
      D 10 hours Correct Answer Incorrect Answer
      E 22 hours Correct Answer Incorrect Answer

      Solution

      If both pipes are open, then total units per hour empty the tank (A-B) = 5-8 = -3 units According to question, Tank has 3/8 of its total capacity in the beginning 3/8 Ă— 80= 30 units Time taken to empty the tank = 30/((-3)) = 10 hours

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