Water enters the impeller of a centrifugal pump radially at a rate of 450 L/min when the

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Water enters the impeller of a centrifugal pump radially at a rate of 450 L/min when the shaft is rotating at 400 rpm. The tangential component of absolute velocity of water at the exit of the 70-cm outer diameter impeller is 55 m/s. The torque applied to the impeller is

(a) 144 N·m 

(b) 93.6 N·m 

(c) 187 N·m

(d) 112 N·m 

(e) 235 N·m

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