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A centrifugal pump operating at 1800 rpm with an efficiency of 70% discharges 30 L/s against...

  1. A centrifugal pump operating at 1800 rpm with an efficiency of 70% discharges 30 L/s against a 25-m head and requires 10.5 KW, Assuming that the efficiency remains constant, estimate the discharge, head and power if the speed is reduced to 1500 rpm.
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