(Solved): A pump transfers water from the upper reservoir to the lower one as shown in the figure (a) below. ...

A pump transfers water from the upper reservoir to the lower one as shown in the figure (a) below. The difference in elevation between the two reservoirs is \( 100 \mathrm{ft} \). The friction head loss in the piping is given by \( K_{L} V^{2} / 2 g \), where \( V \) is the average fluid velocity in the pipe and \( K_{L} \) is the loss coefficient, which is considered constant. The relation between the head added to the water by the pump and the flowrate, Q, through the pump is given in Figure (b) below. If \( K_{L}=15 \), and the pipe diameter is 4 in., what is the flowrate through the pump? (a)