A $15-$hp $($shaft power$)$ pump is used to raise water to a $30-$m higher elevation between two large open reservoirs. The flow rate of water is $25$ L$/$s$.$ If the mechanical losses of the piping is $8$ m which one of the following is the mechanical efficiency of the pump. Take water density as $998$ kg$/$m$3$

Hint: Due to the significant digits you will use during your calculations, you may find the result different in the ones digit or the digits after the comma, if any. You need to choose the closest option.