Question

A European car manufacturer reports that the fuel efficiency of the new MicroCar is 28.5 km/L highway and 22.0 km/L city. What are the equivalent fuel efficiency rates in miles per gal?
Answer: 67.27 mile / gal for the highway and 51.93 mile / gal

If gas costs \$3.50 per gal, how much would it cost to drive 500 miles in the city in this car (assuming the fuel efficiency rating is accurate)?

1. quangkhai
Highway equivalent fuel efficiency rate in miles per gal = 67.27 mile / gal
City Equivalent fuel efficiency rate in miles per gal= 51.93 mile / gal

### How to carry out Unit conversions?

From unit conversions, we know that:
1 mile = 1.61 km
1 gal = 3.8 L
Thus, converting the fuel efficiency rates:
Highway rate = (28.5 km/L) * (1 mile / 1.61 km) * (3.8 L / 1 gal)
Highway equivalent fuel efficiency rate in miles per gal = 67.27 mile / gal
Rate for the city = (22.0 km/L) * (1 mile / 1.61 km) * (3.8 L / 1 gal)
City Equivalent fuel efficiency rate in miles per gal= 51.93 mile / gal