A windmill is taking advantage of strong air currents in order to produce electrical energy. On a typical day the wind speed is around 20 mph and in that speed the windmill produces 900 kw/h (kilowatts per hour). On a stormy day a windmill produces 20% more energy. How much kw/h can three windmills produce in two hours on a stormy day?	Choose the correct option
A) 2880. B) 4860. C) 5780. D) 5760. E) 6480.
6480.fficiency per machine = 900 watt/hr   6480.fficiency due to increase in wind speed = 900*120% =&gt; 1080 watt/hr   Production by each machine in 2 hours is  1080*2= 
<gadget id="calculator"> 1080*2</gadget>
<output>2_160</output>
&gt; 2160 watt   Production by 3 machines=&gt; 2160 watt * 3 = 6480 watt   Answer will be (6480.)
<result>E</result>
A windmill is taking advantage of strong air currents in order to produce electrical energy. On a typical day the wind speed is around 20 mph and in that speed the windmill produces 900 kw/h (kilowatts per hour). On a stormy day a windmill produces 20% more energy. How much kw/h can three windmills produce in two hours on a stormy day?