A certain car gels 24 miles per gallon of gasoline for city driving, which is 60 percent of the number of miles per gallon of gasoline the car gets for high-way driving.
Quantity A
The number of gallons of gasoline used to drive this car 30 miles in the city
Quantity B
The number of gallons of gasoline used to drive this car 45 miles on the highway
答案：A