PROBLEM $3$

To maintain constant pressure, a pump is required in this closed loop shown. The pump produces a constant flowrate of $20$ cfs $.$ The pipes are all $3\mathrm{.}3$ feet in diameter and made of concrete with an estimated roughness of $0\mathrm{.}08.$ inches. Each of the $90$ degrees $($@$)$ elbows have a loss coefficient of $0\mathrm{.}4.$ Determine the pump power required. State all assumptions.