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      Question

      Three taps, P, Q and S, can fill an empty tank in 15

      minutes. Tap P alone can fill it in 30 minutes and tap Q alone can fill it in 45 minutes. How much time will tap S alone take to fill the tank? 
      A 60 minutes Correct Answer Incorrect Answer
      B 90 minutes Correct Answer Incorrect Answer
      C 45 minutes Correct Answer Incorrect Answer
      D 30 minutes Correct Answer Incorrect Answer

      Solution

      The correct answer is B

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