Quantitative Aptitude Pipes and Cistern Study Material
Pipes and Cistern problems usually consist of a cistern or tank to which one or more pipes are connected to fill or/ and empty it. These are similar to Time and Work problems. Here work done is filling/emptying the cistern or tank. And, this work is done by pipes-connected to the tank in place of persons doing the work. The only difference lies in the fact that here work can be positive (filling the tank) as well as negative (emptying the tank) whereas in Time and Work problems, the work done is always positive.
A pipe connected to the tank which fills it is called an Inlet. If the pipe connected to the tank empties it, it is called an Outlet or exit pipe
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