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Ask iit jee aieee pet cbse icse state board community Community Discussion Question: see this
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[Post New]16 Apr 2008 17:19:33 IST
    Subject: see this
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ashish_banga (937)

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Olaaa!! Perrrfect answer. 147  bad job dude!! I dont approve of this answer! 1  [250 rates]
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A job was wrongly estimated to be completed in 10 days by x machines. By deploying 3 extra machines , the job was completed in 12 days. If only 1 additional machine was used, how many days more than that estimated would it have taken to complete the job?
please solve it & help me.
    
[Post New]16 Apr 2008 18:48:42 IST
    Subject: Re:see this
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sboosy (3011)

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Olaaa!! Perrrfect answer. 529  [712 rates]
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\mbox{If} \ x+3 \ \mbox{machines took} \ 12 \ \mbox{days,then} \\ \\ x+4 \ \mbox{machines would have taken} \ \frac{12(x+3)}{x+4} \ \mbox{(Inverse variation here..more machines ..less time)} \\ \\ \mbox{Now according to the wrong data} \ x \ \mbox{machines take} \ 10 \ \mbox{days} \\ \\ x+4 \ \mbox{machines would have taken} \ \frac{10x}{x+4} \ \mbox{days} \\ \\ \mbox{So difference between the actual and predicted will be} \\ \\ \frac{12(x+3)}{x+4} - \frac{10x}{x+4} = \frac{2x+36}{x+4}
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