Quantitative Aptitude – Pipes and Cistern
A very important chapter to learn in quantitative aptitude is Pipes and Cistern. Questions from pipes and cistern are very common in almost every competitive exams.
Now here in this section we will discuss basic concept and formulas of Pipes and Cistern. Learn this topic very carefully. This will also help you in the further aptitude chapters. So let’s begin the topic.
What is Pipes and Cistern ?
Pipes and Cistern is a section of quantitative aptitude. Questions of this topic is generally based on filling or emptying of water or milk or some other liquid from a tank or cistern or reservoir etc. It’s the calculation of filling or emptying a storage tank.
This involves two concept of filling and emptying.
- Inlet
- Outlet
What is Inlet ?
An Inlet is a Pipe which is connected to a tank or reservoir or cistern and main job of this pipe is to fill the storage tank or reservoir or cistern.
What is Outlet ?
An Outlet is a Pipe which is connected to a tank or reservoir or cistern and main job of this pipe is to empty the storage tank or reservoir or cistern.
Important Formulas of Pipe and Cistern
- Suppose a pipe can fill a cistern in x hours, then in 1 hour it will fill 1/x part of the cistern.
- Suppose a pipe can empty a cistern in y hours, then in 1 hour it will empty 1/y part of the cistern.
- Suppose a pipe can fill a cistern in x hours and another pipe can empty the same cistern in y hours, then on opening of both the pipes at the same time the net portion of the cistern will be filled in 1 hour is- (here y > x)
(1/x – 1/y)
- Suppose a pipe can fill a cistern in x hours and another pipe can empty the same cistern in y hours, then on opening of both the pipes at the same time the net portion of the cistern will be empty in 1 hour is- (here x > y)
(1/y – 1/x)
So this is the basic concepts of pipes and cistern. Now if you have any query on this topic then please feel free to ask us. Our team member of www.AptitudeTricks.com will discuss your query here in this page.