A European automobile has a gas mileage of 16km/L ... What is the gas mileage in miles per gallon?. Express your answer using two significant figures.

For getting to the answer of this question, one has to know the conversion between kilometer and miles as well as the conversion between gallons and liter.

1 mile = 1.609 km

Then

16 km = 16/1.609 miles

= 9.94 miles

Again

3.785 liter = 1 gallon

then

1 liter = 1/3.784 gallons

= 0.26 liter

So

16 km/L = (9.94/0.26) miles per gallon

= 38.23 miles per gallon.

= 38 gallons