The power developed by a water turbine running at 120 rpm under a head of 27 m, is 10 mw. if a model with same rotor diameter operates under 20 m head; (a) calculate the rotation speed of the model in rpm a. 6800 b. 8600 с. 1 d. 500 (b) calculate the power output from the model in kw а. 103 b. 107 с. 208 d. 301 (c) if the hydraulic efficiency is 100%, what is the discharge in m3/s through the model a. 30.58 b. 27.32 c. 56.66 d. 93.53