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51问答网 > 甲车每小时行四十千米，乙车每小时行六十千米。甲车从a地，乙车从b地同时出发相向而行。两车相遇后4.

甲车每小时行四十千米，乙车每小时行六十千米。甲车从a地，乙车从b地同时出发相向而行。两车相遇后4.

2025-03-21 08:39:49

推荐回答（2个）

回答1：

甲乙速度比4:6，相遇时距离比也是4：6，相遇后甲走6/10全程用4.5小时，所以全程4.5÷6×10×40＝300

回答2：

用比例和份数法

解：时间一定，路程与速度成正比：

从出发到相遇：速度比：甲：乙=40:60=2:3

路程比：甲：乙=2:3

即：甲车相遇前后的路程比是2:3

所以，40×4.5÷3×（3+2）=300

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