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15问答网 > 客货两车分别从A、B两地同时相向而行。当客车行了全程的3⼀4，货车行了全程的2⼀5时，两车

客货两车分别从A、B两地同时相向而行。当客车行了全程的3⼀4，货车行了全程的2⼀5时，两车

相距45千米，AB两地相距多少千米？

2025-04-01 07:26:31

推荐回答（2个）

回答1：

设 AB距离X千米

若两车未相遇：

则3/4X + 2/5X + 45 =0 解得X<0 （不合题意）所以

：两车相遇后距离为45千米

即 45= 3/4X - 2/5X 解得X=900/7≈128.57

回答2：

45/(4/3-5/2)＝45/20/7＝7/900

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