A typical pump has a head which, for a given shaft rotation rate, varies with the flow rate, resulting in a pump performance curve as in Fig. P3.142. Suppose that this pump is 75 percent efficient and is used for the system in Prob. 3.141. Estimate (a) the flow rate, in gal/min, and (b) the horsepower needed to drive the pump. Fig P3.142

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300 Pump pectocmance 100 Flow rate. fls