How do you think the interaction between the wind and the turbine blades result in electrical energy? Explain your answer.

The wind loses some of its kinetic energy (energy of movement) and the turbine gains just as much. As you might expect, the amount of energy that a turbine makes is proportional to the area that its rotor blades sweep out; in other words, the longer the rotor blades, the more energy a turbine will generate.

Adozen is 1221/12 = 1.751.75 x 12 = 21therefore, 1.75 is the answer.