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A windmill is taking advantage of strong air currents in order to prod
[#permalink]
28 Jun 2016, 07:01
28 Jun 2016, 07:01
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Question Stats:
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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 800 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?
A. 2880.
B. 4860.
C. 5780.
D. 5760.
E. 6380.
_________________
A. 2880.
B. 4860.
C. 5780.
D. 5760.
E. 6380.
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Re: A windmill is taking advantage of strong air currents in order to prod
[#permalink]
28 Jun 2016, 08:03
28 Jun 2016, 08:03
Bunuel wrote:
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 800 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?
A. 2880.
B. 4860.
C. 5780.
D. 5760.
E. 6380.
A. 2880.
B. 4860.
C. 5780.
D. 5760.
E. 6380.
1 windmill:
Normal Day = 800 kw/h
Stormy Day = 800*1.2=960 kw/h
3 windmills for 2 hours on stormy day
960*3*2=5760
Answer: D
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Re: A windmill is taking advantage of strong air currents in order to prod
[#permalink]
28 Jun 2016, 10:20
28 Jun 2016, 10:20
Bunuel wrote:
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 800 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?
A. 2880.
B. 4860.
C. 5780.
D. 5760.
E. 6380.
A. 2880.
B. 4860.
C. 5780.
D. 5760.
E. 6380.
Efficiency per machine = 800 watt/hr
Efficiency due to increase in wind speed = 800*120% => 960 watt/hr
Production by each machine in 2 hours is 960*2 => 1920 watt
Production by 3 machines => 1920 watt * 3 = 5760 watt
Answer will be (D)
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Abhishek....
PLEASE FOLLOW THE RULES FOR POSTING IN QA AND VA FORUM AND USE SEARCH FUNCTION BEFORE POSTING NEW QUESTIONS
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Re: A windmill is taking advantage of strong air currents in order to prod
[#permalink]
29 Jun 2016, 06:59
29 Jun 2016, 06:59
Re: A windmill is taking advantage of strong air currents in order to prod
[#permalink]
23 Mar 2021, 10:47
23 Mar 2021, 10:47
Windy day= 800 + 1/5(800) kw per hour = 960 KWH.
960 in one hours, that means, 960*2 in 2 hours =1920 KWh
3 windmills will produce: 3*1920= 5760 KWh
960 in one hours, that means, 960*2 in 2 hours =1920 KWh
3 windmills will produce: 3*1920= 5760 KWh
gmatclubot
Re: A windmill is taking advantage of strong air currents in order to prod [#permalink]
23 Mar 2021, 10:47
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