fluids mechanics 3

A Francis turbine rotates at 150pm and delivers 167kW hydraulic power, when the effective head is 19m. The velocity of flow is constant at 6m/s and the peripheral (blade) speed at inlet is 17m/s. Assuming hydraulic efficiency of 89%, overall efficiency of 76% and that there is no velocity of whirl at exit, calculate The diameter of the rotor in meter The angle of the guide vanes The angle of the inlet of the rotor blades The flowrate (in m3/s) The breadth of the rotor blades at the inlet if the blades constitute 12% of the circumference. (answer in meter)