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标题: 求助：一道数学题 [打印本页]

作者: longxiaomeim 时间: 2005-10-31 07:06 标题: 求助：一道数学题

A hiker walking at a constant rate of 4 miles per hour is passed by a cyclist traverling in the same direction and in the same path at a constant rate of 20 miles per hour .The cyclist stops to wait to 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?

多谢！

作者: sammen 时间: 2005-10-31 11:16

没明白题意,好像没办法求啊?楼主这是原题,还是JJ啊?

作者: hopr999 时间: 2005-10-31 21:29

（20－4）×5/4＝20

作者: longxiaomeim 时间: 2005-11-2 19:52

能否解释一下，我每次算都是5/4。多谢！！

作者: jojof5460 时间: 2005-11-3 07:16

自行车们前进的同时，hiker也在行走啊。所以是（20－4）×5是5minutes 产生的distance。clear？

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