A coal-fired power station has a power output of 4. It has been suggested that awind farm could replace this power station.

A coal-fired power station has a power output of 4.0GW. It has been suggested that a wind farm could replace this power station. Using the data below, determine the area that the wind farm would occupy in order to meet the same power output as the coal-fired
power station.
Radius of wind turbine blades = 42 m
Area required by each turbine = 5.0×104 m2
Efficiency of a turbine = 30%
Average annual wind speed = 12 m s-1
Average annual density of air = 1.2 kg