Problem $15$: A pump discharges water from a lower reservoir to an upper reservoir with $12-$inch

diameter $1000ft$ long pipe $($Roughness Coefficient, $=0\mathrm{.}0003).$ The upper reservoir water

surface elevation is $50ft$ above the lower reservoir water surface. Calculate the pump head $($ft$)$

to have a discharge of $5cfs.$ Assume the water temperature $60F.$

$($A$)55$

$($B$)61$

$($C$)65$

$($D$)69$