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Q9) A centrifugal pump impeller is 665 mm outside diameter and 300 mm inside diameter and runs at 360 rpm. The radial velocity at the inlet and outlet is 7.2  m/s.

The velocity of the whirt at the exit is 6.1  m/s, and the volumetric flow rate throughout is 0.1355  m³/s.

Calculate EACH of the following:

(a) the blade outlet angle; (4)

(b) the blade inlet angle; (4)

(c) the width of the impeller at the inlet and outlet; (4)

(d) the power. (4)

Note: The working fluid is water.