A centrifugal pump rotating at 1450 rpm discharges 0.015 m ³ /s of water. Its impeller has internal and external diameters of 200 mm and 400 mm, respectively. Width of the impeller at the inlet is 15 mm and at the outlet 8 mm. If the blade angle at outlet is 35°, find the pressure head rise in the impeller neglect all losses.

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