Question

Gas mileage is the number of miles you can drive on a gallon of gasoline. A test of a new car results in 520 miles on 20 gallons of gas. How far could you drive on 40 gallons of gas? What is the car's gas mileage? Show and explain your work.

Answer 1

If 20 gallons gives 520 miles then 40 gallons will give 1,040 miles because 40 is 20 doubled.