Question

How many litres of water flows 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 30 cm/sec ?

Answer 1

Given, area of the cross section of pipe = $5c{m}^2$

Speed of the water flowing out of the pipe = 30 cm/sec

Now, volume of the water flowing out of the pipe in one second = $\text{area of the cross section}\times 30=5\times 30=150c{m}^3$

The volume of the water flowing out of the pipe in one minute = $60\times 150=9000c{m}^3$

Since $1000c{m}^3=1litre$

So, $9000c{m}^3=9litres$

Hense, Volume of the water flowing out of the pipe in one minute is 9 litres.