When the valve $(KL=0\mathrm{.}15)$ is opened, the water in a canal is pumped at $60ft\frac{3}{s}$ through a drainage pipe $($diameter $d=1\mathrm{.}4ft)$ across

a two$-$lane road embankment using a $22-$hp turbine runs. The corrugated steel pipe of roughness $0\mathrm{.}024-$in has two bends of loss

coefficient $KL=0\mathrm{.}112.$ Use $H=7\mathrm{.}1ft$ and $z=47\mathrm{.}5ft.$ The width, $D$ of the embankment is $54\mathrm{.}5ft.$ Determine the efficiency of the

turbine $[\%].$