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Metric countries rate the fuel efficiency of a car by the number of liters of gasoline required to drive 100 kilometers. If a car takes 15 liters per 100 kilometers, what is its efficiency in miles per gallon? Use the conversions 1gal=3.7854 L and 1 mile = 1.6 km

Respuesta :

First we calculate the efficiency in liters over kilometers so:

[tex]\frac{100}{15}\frac{\operatorname{km}}{lt}=6.66\frac{\operatorname{km}}{lt}[/tex]

Now we can convert the units like

[tex]6.66\frac{\operatorname{km}}{lt}\cdot\frac{3.7854}{1}\frac{lt}{\text{gal}}\cdot\frac{1}{1.6}\frac{\text{miles}}{\operatorname{km}}=15.75\frac{\text{miles}}{\text{gal}}\approx15.8\frac{miles}{gal}[/tex]

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