选择题
2020 AMC 8 Problem 11: Bike vs Bus Speed
After school, Maya and Naomi headed to the beach, 6 miles away. Maya decided to bike while Naomi took a bus. The graph below shows their journeys, indicating the time and distance traveled. What was the difference, in miles per hour, between Naomi's and Maya's average speeds?
2020 AMC 8 第11题：自行车与公交车速度
放学后，玛雅和内奥米前往 6 英里外的海滩。玛雅决定骑自行车，而内奥米则乘坐公共汽车。下图显示了他们的旅程，显示了行驶的时间和距离。内奥米和玛雅的平均速度之间的差异（以英里每小时为单位）是多少
A.
6
B.
12
C.
18
D.
20
E.
24