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# A car travelled 462 miles per tankful of gasoline on the

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Manager
Joined: 23 Mar 2008
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A car travelled 462 miles per tankful of gasoline on the [#permalink]  18 Apr 2008, 08:00
A car travelled 462 miles per tankful of gasoline on the highway and 336 miles per tankful of gasoline in the city. If the car travelled 6 fewer miles per gallon in the city than on the highway how many miles per gallon did the car travel in teh city?

a) 14
b) 16
c) 21
d) 22
e) 27
Manager
Joined: 02 Mar 2008
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Concentration: Finance, Strategy
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Re: car [#permalink]  18 Apr 2008, 08:33
x : miles/gallon in city
462x/336=x+6
<-> (462-336)x/336 = 6
x=6*336/126 =16
SVP
Joined: 28 Dec 2005
Posts: 1583
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Re: car [#permalink]  18 Apr 2008, 10:41
mpg(city) = mpg(highway) - 6

mpg(city) = 336/c

mpg(highway) = 462/c where c=tank capacity

6c = 126 --> c=21

therefore, 336/21 = 16
VP
Joined: 10 Jun 2007
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Re: car [#permalink]  18 Apr 2008, 12:30
puma wrote:
A car travelled 462 miles per tankful of gasoline on the highway and 336 miles per tankful of gasoline in the city. If the car travelled 6 fewer miles per gallon in the city than on the highway how many miles per gallon did the car travel in teh city?

a) 14
b) 16
c) 21
d) 22
e) 27

x = total gallons in one tank of gas
336/x - 6 = 462/x
x = 21
For City, you have mile/gallon = 336/21 = 16
Re: car   [#permalink] 18 Apr 2008, 12:30
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