📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!
  • google app store apple app store
    • ✖

      Question

      Pipes ‘A’ and ‘B’ can fill a tank in 6 hours and

      9 hours, respectively. If pipe ‘C’ is opened along with pipes ‘A’ and ‘B’, then the tank gets filled in 9 hours. Find the time taken by pipe ‘C’ to empty (3/5)th part of the same tank.
      A 2.6 hours Correct Answer Incorrect Answer
      B 1.6 hours Correct Answer Incorrect Answer
      C 3.6 hours Correct Answer Incorrect Answer
      D 4.6 hours Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Let capacity of the tank = 18 litres (lcm of 6 and 9) Efficiency of pipe ‘A’ = (18/6) = 3 litres/hour Efficiency of pipe ‘B’ = (18/9) = 2 litres/hour Efficiency of all the three pipes together = (18/9) = 2 litres/hour Efficiency of pipe ‘C’ = 2 – (3 + 2) = (-3) litre/hour {Negative sign shows that pipe ‘C’ is an outlet pipe} Required time taken = {(3/5) × 18)}/3 = 3.6 hours

      Practice Next
      More Pipes and cisterns Questions
      ask-question