2. 外语
  3. 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 tra

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 tra

admin2022-10-18  46
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?
选项 A、14
B、16
C、21
D、22
E、27
答案B
解析 Let g be the number of gallons of gasoline in1 tankful. Then the number of miles per gallon while traveling on the highway is 462/g and this number is 6 more than 336/g，which is the number of miles per gallon while traveling in the city.
Solving462/g= 6 +336/g gives g = 21. Therefore, the number of miles per gallon while the car was traveling in the city was336/21= 16.
The correct answer is B.
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