$5\mathrm{.}118$ A pump moves water horizontally at a rate of $0\mathrm{.}02\frac{m^3}{s}.$

Upstream of the pump where the pipe diameter is $90$ mm $,$ the pres$-$

sure is $120$ kPa $.$ Downstream of the pump where the pipe diameter

is $30$ mm $,$ the pressure is $400$ kPa $.$ If the loss in energy across the

pump due to fluid friction effects is $170N*\frac{m}{k}g,$ determine the

hydraulic efficiency of the pump.