Question

Water is being pumped out through a circular pipe whose internal diameter is 7cm. if the flow of water is 12 cm/s . how many litre of water is being pumped out in an hour

Answer 1

water flow rate  (cm3 / s ) = cross section area ( cm2 ) × speed of water flow ( cm/s )

 

                                          = ( π×3.5×3.5)×( 12 ) ≈ 462 cm3 /s

 

volume of water collected in 1 hour  = 462×3600/1000 ≈ 1662 litre