Question

How many litres of water flow out of a pipe having an area of cross section of $5c{m}^2$ in $1$ minute, if the speed of water in the pipe is $30cm/sec$ ?

Answer 1

It is given that
Speed of water in the pipe $=30cm/sec$

We know that

Volume of water flows out of the pipe in one second = area of cross section $\times$ length of water flows in one sound

By substituting the values

Volume of water that flows out of the pipe in one second $=5\left(30\right)=150c{m}^3$

So the volume of water that flows out of the pipe in one minute $=150\left(60\right)=9000c{m}^3=9$ litres

Therefore, $9$ litres of water flows out of the pipe in one minute.