Question

A hose-pipe of cross-section area 2 cm² delivers 1500 liters of water in 5 minutes. What is the speed of water in m/s through the pipe? 

Answer 1

Vol. of water flowing in 1 sec= ` (1500 xx 1000)/(5 xx 60 )= 5000 "cm"^3`

Vol. of water flowing =area of cross-section speed of water

` 5000 "cm"^3/s = 2 "cm"^2 xx "speed of water"`

⇒ speed of water = `( 5000 )/( 2 ) "cm"/s`

⇒ speed of water = `2500 "cm"/s`

⇒ speed of water = `25 "m"/s`