经过了多少分钟
- 时间:2020-05-22 15:51:38
- 分类:数学世界
- 阅读:152 次
一辆客车和一辆货车同时从甲地发往乙地,
当客车到达乙地时,立刻提速50%原路返回甲地,
并在返回的途中遇到了货车,相遇时从两车出发开始算起,恰好经过2小时。
当火车到达乙地时,客车恰好行驶至甲乙两地的中点。
那么当客车返回甲地时,从一开始算起,经过了多少分钟?
数学题解答:原来的速度比是4:3,返回时速度比是6:3=2:1。
货车到达乙地是2又2/5小时。
客车到甲地还需要走5份,每份只要1/5小时、所以还需1小时。

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