A car traveled 462 miles per tankful of ga
题型：单项选择题
问题：
A car traveled 462 miles per tankful of gasoline on the highway and 336 miles per tankful of gasoline in the city. If the car traveled 6 fewer miles per gallon in the city than on the highway, how many miles per gallon did the car travel in the city ？（）
A.14
B.16
C.21
D.22
E.27