On a recent trip, Cindy drove her car 290 miles, rounded to the nearest 10 miles, and used 12 gallons of gasoline, rounded to the nearest gallon. The actual number of miles per gallon that Cindy's car on this trip must have been between
(A)290/12.5 and 290/11.4
(B)295/12 and 284/11.4
(C)284/12 and 295/12
(D)284/12.5 and 295/11.4
(E)295/12.5 and 284/11.4
答案是(D)
可以請各位看一下嗎...有點不是很懂題目意思...OG後面的解釋也不是很了解
謝謝