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      Question

      Tap P can fill the tank in 5 hours and Tap Q can empty

      it in hours. Tap P starts filling and they opened for 1 hour each alternatively. In what time will the tank be full?
      A 12(1/2) hours Correct Answer Incorrect Answer
      B 30 hours Correct Answer Incorrect Answer
      C 25 hours Correct Answer Incorrect Answer
      D 22 hours Correct Answer Incorrect Answer
      E 15 hours Correct Answer Incorrect Answer

      Solution

      2 Hours = 1 work done        Last work will be done by P Therefore, 15 -3 = 12  

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