1)

Pipe A completely fills the tank in 8 hours, then what part of the tank will be filled by pipe A in 1 hour?

2)

An inlet pipe fills $\frac{1}{14}$^{th} part of the tank in 1 hour. How much time will the inlet pipe take to fill the tank?

3)

A tank can be filled up in 4 hours by an inlet A. And an outlet B can empty the tank in 8 hours. If both inlet and outlet are opened simultaneously, then after how much time will the tank get filled?

**[Bank Clerks 2009]**

4)

A pipe can fill the tank in 10 hours. While another pipe can empty the tank in 6 hours. Find the time taken to empty the tank when both the pipes are opened together.

**[Bank Clerks 2010]**

5)

Pipe A can fill the tank in 30 hours, while pipe B can fill the same tank in 10 hours, Pipe C can empty this full tank in 40 hours. If all the three pipes are opened simultaneously, how much time is needed to completely fill the tank?

**[Hotel mgmt. 2010]**

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