SOLUTION: On a recent trip, George traveled 300 miles. The number of miles of highway driving was 4 times the number of miles of city driving. If his car gets 20 miles to the gallon in city
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Question 314090: On a recent trip, George traveled 300 miles. The number of miles of highway driving was 4 times the number of miles of city driving. If his car gets 20 miles to the gallon in city driving, and 30 miles to the gallon on the highway, how much gas did he use? Answer by mananth(16946) (Show Source):
You can put this solution on YOUR website! Let city driving be x miles.
highway driving = 4 times city driving =4x
5x=300
x=60 city driving.
highway driving = 240 miles.
..
20 mpg in city.
in city 60 /20 = 3 gallons.
..
240 miles on highway.
30 mpg.
On highway 240/30 = 8 gallons
..
Total gas = 11 gallons
