## Pipe and Cistern

Pipe and Cistern – General Questions

Pipe and cistern is another format of time and work-based questions. This is the aptitude questions and answers section on “*Pipes and Cistern*” with explanation for various interview, competitive *examination* and entrance *test* .

This test has been designed to test your skill for **Pipe & Cistern**. You will be presented Multiple Choice Questions (MCQs) based on **Pipe & Cistern Concepts**, where you will be given four options. And select the best suitable answer for the question and then proceed to the next question without wasting given time. You will get your online test score after finishing the complete test.

## Cistern Meaning in hindi

The correct meaning of Cistern in Hindi is** टंकी**. It is written as Vikretā in Roman. Cistern is a noun according to parts of speech. It is spelled as [sis-tern]

### Pipe and Cistern Formula

Given below are a few important formulas which shall help you solve the pipes and cistern based questions quicker and more efficiently:

- If x hours are required to fill up a tank, then part filled in 1 hr =1/x
- Net work done = (Sum of work done by Inlets) – (Sum of work done by Outlets)
- If y hours are required to empty the tank, then part emptied in 1 hour = 1/y
- If a pipe can fill a tank in x hours and can empty the same tank in y hours. When both the pipes are opened at the same time , then the net part of the tank filled in 1 hr = {(xy) / (y-x)}, provided y>x
- If a pipe can fill a tank in x hours and can empty the same tank in y hours. When both the pipes are opened at the same time, then the net part of the tank filled in 1 hr = {(xy) / (x-y)}, provided x>y
- One inlet can fill the tank in x hr and the other inlet can fill the same tank in y hrs, if both the inlets are opened at the same time, the time taken to fill the whole tank = {(xy) / (y+x)}
- If two pipes take x and y hours respectively to fill a tank of water and a third pipe is opened which takes z hours to empty the tank, then the time taken to fill the tank = {1 / (1/x)+(1/y)+(1/z)} and the net part of the tank filled in 1 hr = (1/x)+(1/y)-(1/z)

Just memorising the above-mentioned formulas may not be sufficient, candidates need to solve more and more sample questions based on the same in order to excel in this topic.