Problem 390
Which car gives the better gasoline mileage in making the same trip: the car that goes 340 miles on 10 gallon of gasoline or the car that goes 500 miles on 15 gallons of gasoline?
Solution
Mileage for first car is 340/10 = 34 miles/gallon
Mileage for second car is 500/15 = 33.33 miles /gallon
Now we can see that first car will give better mileage.