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energy in an industrial town

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by sanju09 » Wed Mar 02, 2011 2:25 am
The cost of electric energy in an industrial town is $3 per unit for the first 100 units; $2.5 per unit for the second 100 units and $2 per unit for the remaining units. How many units can one get for $500?
(A) 175
(B) 180
(C) 200
(D) 225
(E) 250


[spoiler]made up[/spoiler]
The mind is everything. What you think you become. -Lord Buddha



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by maihuna » Wed Mar 02, 2011 2:31 am
100*3+x*2.5 = 500
=>2.5x= 200 =>x=2000/25 = 80

so 180.

An useless question yar, wat is the motive behind this crap trash.
Charged up again to beat the beast :)
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by sanju09 » Wed Mar 02, 2011 2:34 am
maihuna wrote:100*3+x*2.5 = 500
=>2.5x= 200 =>x=2000/25 = 80

so 180.

An useless question yar, wat is the motive behind this crap trash.
Please visit our verbal forum too B-)

Please do not attempt a useless question.
The mind is everything. What you think you become. -Lord Buddha



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by ankur.agrawal » Wed Mar 02, 2011 2:37 am
sanju09 wrote:The cost of electric energy in an industrial town is $3 per unit for the first 100 units; $2.5 per unit for the second 100 units and $2 per unit for the remaining units. How many units can one get for $500?
(A) 175
(B) 180
(C) 200
(D) 225
(E) 250


First 100 units = 100*3= $300

Left : 500-300 = $200

x * 2.5 = 200 ; x=80.

So total = 180 for $ 500 .

B
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by maihuna » Wed Mar 02, 2011 3:14 am
Actually I realized after solving it, since I had wasted all that I can, I thought pressing ok rather than cancel, wohu really put verbal Q, I am quite sure how good they will be seeing this sample, do let me know that, so that I can avoid that through distance :( hehee

sanju09 wrote:
maihuna wrote:100*3+x*2.5 = 500
=>2.5x= 200 =>x=2000/25 = 80

so 180.

An useless question yar, wat is the motive behind this crap trash.
Please visit our verbal forum too B-)

Please do not attempt a useless question.
Charged up again to beat the beast :)
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