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最新题目

题目内容

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纠错
Trains M and N are traveling west on parallel tracks. At exactly noon, the front of Train M, which is traveling at a constant speed of 80 kilometers per hour (km/h), is at the rail crossing at Location X, and the front of Train N, which is traveling at a constant speed of 65 km/h, is 30 km west of the rail crossing at Location X. The trains continue traveling at their respective speeds until the front of Train M and the front of Train N are simultaneously at the rail crossing at Location Y.In the table, identify the number of kilometers that the front of Train M has traveled between noon and 12:45 p.m. and the number of kilometers that the front of Train N has traveled between noon and 1:00 p.m.

Front of Train M Front of Train N
55
55
55
60
60
60
65
65
65
70
70
70
75
75
75
正确答案: 2,3

参考解析

提交我的解析
    知识点概述
    本题涉及行程问题中的速度、时间和路程的关系,即路程 = 速度×时间。 解析
    - Train M在12:00 - 12:45行驶的路程:12:00 - 12:45是45分钟,即\(45\div60 = 0.75\)小时,Train M速度是80千米/小时,根据路程 = 速度×时间,其行驶路程为\(80×0.75 = 60\)千米。 - Train N在12:00 - 1:00行驶的路程:12:00 - 1:00是1小时,Train N速度是65千米/小时,行驶路程为\(65×1 = 65\)千米。 所以Train M对应60,Train N对应65。

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