AMC 8 1999 Problem 4
AMC8 1999 年第 4 题
行程问题★☆☆☆☆
The diagram shows the miles traveled by bikers Alberto and Bjorn. After four hours, about how many more miles has Alberto biked than Bjorn?
图中显示了骑行者 Alberto 和 Bjorn 行驶的英里数。四小时后，Alberto 比 Bjorn 大约多骑了多少英里？
- A.15
- B.20
- C.25
- D.30
- E.35
正确答案 · Correct Answer
A
解析 · Solution
Solution 1
After 4 hours, we see that Bjorn biked 45 miles, and Alberto biked 60. Thus the answer is 60-45=15, .
We see that each dot is 15 units away from the nearest one above it. So the answer is .
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