An inward flow reaction turbine, operating under 30 in head, develops 4000 kW while running at 300 RPM. The overall efficiency of the water turbine is 0.85; the hydraulic efficiency is 0.9; and the radial velocity of flow at inlet is 7 m/s. The inlet guide vane angle at full gate opening is 300. Calculate the diameter and width of the runner at inlet. Blade thickness coefficient is 5%.