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      Question

      Pipe A alone fill the tank in x hours and Pipe B alone

      fill the tank in (x – 8) hours. If the efficiency of pipe B is triple of pipe A and pipe A fill the tank is 55 liters per hour, then what is the capacity of the tank?
      A 675 liters Correct Answer Incorrect Answer
      B 660 liters Correct Answer Incorrect Answer
      C 600 liters Correct Answer Incorrect Answer
      D 630 liters Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Pipe A alone fill 55 liters per hour, so Pipe B alone fill 165 liters per hour. Capacity of the tank = T => T/55 – T/165 = x – (x – 8) => 3T – T = 1320 => T = 660 liters

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