A wind turbine has blades of length 45 m. It is installed in a region with an average wind speed of 12 m s-1 and an air density of 1.2 kg m-3. If the turbine and generator system has an overall efficiency of 35%, what is the electrical power output of the turbine?
0.19 MW0.19\text{ MW}0.19 MW
2.31 MW2.31\text{ MW}2.31 MW
4.62 MW4.62\text{ MW}4.62 MW
6.60 MW6.60\text{ MW}6.60 MW