OG11 P169 T129 rounded to nearest 10 miles+ rounded to nearest gallon

亲爱的NN们，看了很多帖子，大家都说rounded 是四舍五入，但是这道题似乎不是这个原则

题目:

On a recent trip, Cindy drove her car 290 miles, rounded to the nearest 10 miles, and used 12 gallons of gasoline, rounded to nearest gallon, the actual number of miles per gallon that Cindy's car got on this trip must be between

答案居然是D, 但是284 rounded to nearest 10 miles 是290吗？ 11.4 rounded to nearest  gallon 是12 吗？ 284四舍五入不是280吗？ 11.4四舍五入不是11吗？

D) 284/12.5 and 295/11.4