Water running in a cylindrical pipe of inner diameter 7 cm, is collected in a container at the rate of 192.5 litres per minute. Find the rate flow of water in the pipe in km/hr.

Explanation

Rate of water collected in the container ` = 192.5` lites per minute

`=192500**60` ml per hour `= 192500**60` cm^3 per hour

`:.` Area of container `**` Rate of flow`(x) = 192500**60` cm^3 per hour

`=>22/7**3.5**3.5**x = 192500**60`

`=>x = (192500**60**7**2**2)/(22**7**7) = 300000` cm/hour

`=> x = 3000` m/h

`=>x = 3 ` km/h

So, rate of flow of water is `3` km/hour.