Q35:
Stations X and Y are connected by two separate, straight, parallel rail lines that are 250 miles long. Train P and train Q simultaneously left Station X and Station Y, respectively, and each train traveled to the other’s point of departure. The two trains passed each other after traveling 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 speed of 70 miles per hour.
(2) Train Q averaged a speed of 55 miles per hour for the entire trip.
答案是C,我觉得应该选D阿,只要知道其中一个的路程就够了吧,还请NN指教啊
答案应该是A吧。有讨论过。
P前面average 70mile,两个小时跑了140,那么Q跑了110。
而(2)明确指出是entire trip,可以前面两小时猛开,相遇后再磨蹭,保障平均数就行了;或者前面磨蹭,相遇后再猛开。。。
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