A pump station is designed where one pump operates while the other pump is in stand$-$by; the operating curve is shown in Figure below. The pump was sized for the peak$-$hour flow of $2600$ gpm at $200$ ft of head. The average daily flow is $2\mathrm{.}46$ MG $.$ The cost of energy is $$\frac{0\mathrm{.}10}{k}Wh.$ The variable speed drives have an efficiency of $97$ percent, the motor is $90$ percent efficient, and, considering the power factor, the conversion from hp to kW is $0\mathrm{.}8.$ What is the average pump speed; what is the energy savings if pumps are converted from constant speed to variable speed?