作者mince (唉唷!!)
看板GMAT
标题[计量] pp2-ps76
时间Thu May 14 00:21:15 2009
A hiker walking at a constant rate of 4 miles per hour is passed by a cyclist
traveling in the same direction along the same path at a constant rate of 20
miles per hour. The cyclist stops to wait for the hiker 5 minutes after
passing her, while the hiker continues to walk at her constant rate. How
many minutes must the cyclist wait until the hiker catches up?
the answer is 20
有点不太懂题目
请问有人会吗?
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