A pump is used to raise water from a reservoir through 800m of 20cm pipe (f=0.033). If the pipe is to be replaced with a new one having the same length but with a diameter of 25 cm and f=0.022,...

A pump is used to raise water from a reservoir through 800m of 20cm pipe (f=0.033).

If the pipe is to be replaced with a new one having the same length but with a diameter of 25 cm and f=0.022, determine the power saved if the flow is maintained at 70lps.