A centrifugal pump has an impeller of outer diameter, 20 cm and outer width,4 cm.
The pump delivers a flow of 30 L/s against a head of 10.5 m at an operating speed
of 550 rpm. If the hydraulic efficiency of the pump is 85% and the overall efficiency
is 80%, determine the impeller outlet vane angle and the power required to run the
pump.
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