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29 October, 08:10

car gets 12 miles per gallon uphill and 24 miles per gallon downhill. If the car goes to the top of Pikes Peak and back (48 miles uphill followed by 48 miles downhill), what is the car's gas mileage, in miles per gallon, for the entire trip?

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  1. 29 October, 09:11
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    The car's gas mileage, in miles per gallon, for the entire trip is 16.

    Explanation:

    Car gets 12 miles per gallon uphill and 24 miles per gallon downhill.

    Uphill mileage = 12 miles per gallon

    Downhill mileage = 24 miles per gallon

    Distance to peak = 48 miles.

    Distance to peak = Uphill mileage x Gas used uphill

    48 = 12 x Gas used uphill

    Gas used uphill = 4 gallon

    Distance to peak = Downhill mileage x Gas used downhill

    48 = 24 x Gas used downhill

    Gas used downhill = 2 gallon

    Total distance traveled by car = 48 + 48 = 96 miles

    Total gas used = 4 + 2 = 6 gallons

    Total distance = Mileage x Gas used

    96 = Mileage x 6

    Mileage = 16 miles per gallon

    The car's gas mileage, in miles per gallon, for the entire trip is 16.
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