A Kaplan turbine develops 20 MW of power at a head of 35 m with a rotational speed of 420 rpm. The outer diameter of the blades is 2.5 m and the hub diameter is 0.85 m. If the overall efficiency of the turbine is 85% and the hydraulic efficiency is 88%, calculate the (a) discharge, (b) inlet guide-vane angle, and (c) the inlet blade angle at the tip of the blades.
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