AMC 8 2011 Problem 9
AMC8 2011 年第 9 题
行程问题★★☆☆☆
Carmen takes a long bike ride on a hilly highway. The graph indicates the miles traveled during the time of her ride. What is Carmen's average speed for her entire ride in miles per hour?
卡门在一条丘陵公路上骑了很长时间的自行车。这张图表显示了她骑车时行驶的英里数。卡门整个旅程的平均速度是多少英里每小时？
Miles | 英里数
Hours | 小时数
- A.2
- B.2.5
- C.4
- D.4.5
- E.5
正确答案 · Correct Answer
E
解析 · Solution
Solution 1
We observe the graph and see that the shape of the graph does not matter. We only want the total time it took Carmen and the total distance she traveled. Based on the graph, Carmen traveled 35 miles for 7 hours. Therefore, her average speed is 5
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