While driving your rental car on your vacation in Europe, you find that you are getting 11.3 km/L of gasoline. What does this value correspond to in miles per gallon?

Answer 1

Here, we can use stoichiometry in order to convert to our desired units

We are given 11.3 km/L, want mpg

1. conversion of km to miles: 1 km = 0.621 miles
2. conversion of L to gallons: 1 L = 0.264 gallons

The goal of stoichiometry is to cancel units on the top and bottom

(11.3 km/1 L) x (0.621 miles / 1 km) x ( 1L / 0.264 gallons)

Answer with 3 significant figures = 26.6 miles/gallon