Fluid C (density 1000 kg / m3, viscosity 1.00 mPa s) is placed in a cylindrical tank with a tank diameter of 1.20 m (with 4 obstacle plates with a width of 0.120 m) to a liquid depth of 1.50 m, and a 6-blade turbine blade is provided. It was stirred at 120 rpm using (0.600 m in diameter, 0.120 m in width). Find the required power for stirring at this time.