求大神解析这道OG上的数学题

Jessie小潘潘 · 发表于 2019-11-2 14:17:18

Station X and Y are connected by two seperate, straight, parallel rail lines that are 250 miles long. Train P and Q simultaneously left station X and Y, respectively, and each train traveled to the other's point of departure. The two train passed each other after travelling for 2 hours. When the two trains passed, which train was nearer to its destination?

1. at the time when the two trains passed, train P had averaged a spped of 70 miles per hour
2. Train Q averaged a speed of 55 miles per hour for the entire trip

条件2为什么不成立

七七x · 发表于 2019-11-3 20:10:58

条件2中所说是整个路程平均速度，不是相遇之前的速度。全程速度55，不代表一直都是55，相遇之前可能很快也可能很慢。

求大神解析这道OG上的数学题

所属分类: GMAT考试

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