Concept: the root concept of pipes and cistern as same as time and work.

The inlet pipe is considered as positive work and leak or exit pipe is considered as negative work.

Important points:

1) If a pipe can fill a tank in x hours, part filled in 1 hour = 1 over straight x

2) If a pipe can empty the tank in y hours, part emptied in 1 hour = 1 over straight y

3) If a pipe can fill a tank in x hours and due to a leak at the bottom of the tank it gets emptied in y hours.

So they together can fill the tank In fraction numerator x y over denominator x minus y end fraction hours.

4) If two pipes separately can fill a tank in x hours and y hours  respectively, then together they can fill the tank in fraction numerator xy over denominator straight x space plus space straight y end fraction hours.

 

  • Test 1

    15 Questions
    15 Minutes
    70% Complete
    0%
  • Test 2

    15 Questions
    15 Minutes
    70% Complete
    0%
  • Test 5

    15 Questions
    15 Minutes
    70% Complete
    0%
  • Test 6

    15 Questions
    15 Minutes
    70% Complete
    0%
  • Test 7

    15 Questions
    15 Minutes
    70% Complete
    0%
  • Test 8

    10 Questions
    15 Minutes
    70% Complete
    0%