Math CentralQuandaries & Queries


Question from margaret:

we travelled 130 kilometers on 10 liters of gas. How many miles to the gallon did I get


If you want to do the calculations yourself then you need to know how many kilometers are in a mile (1 mile = 1.609 kilometers) and how many liters are in a gallon (1 US gallon = 3.785 liters and 1 Imperial gallon = 4.546 liters). I assume you want US gallons.

Thus 130 kilometers = 130/1.609 = 80.778 miles and 10 liters = 10/3.785 = 2.64 liters. Thus

130/10 = 13 kilometers/liter = 80.778/2.64 = 30.58 miles per gallon.

If you don't want to do the calculations yourself you can ask Google. Type 13 kilometers per liter in miles per gallon into the Google search window and you will get the response 13 kilometers per liter = 30.5778958 miles per gallon.


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