Bhanu Chaudhary
Poll
Professional
Asked: 2022-03-07T16:33:58+05:30

Two pipes can fill a tank in 15 hours and 20 hours respectively, while the third pipes can empty it in 30 hours. If all the pipes are opened simultaneously, the empty tank will be filled in:

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Two pipes can fill a tank in 15 hours and 20 hours respectively, while the third pipes can empty it in 30 hours. If all the pipes are opened simultaneously, the empty tank will be filled in:

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    1 Answer

    1. Professional

      Correct Answer: 12 hours
      1/15+1/20+1/30
      4+3+2/60

      (A and B -> filling pipe, C->waste pipe)

      According to question

      All pipes opened simultaneously

      A+B will fill (4+3) = 7 units/ hr

      C will empty =2 units /hr

      total filling/hr =7−2=5units

      tank will be filled in

      T.C/Efficiency=60/5=12hrs

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