数学题：客车从甲地到乙地要6小时；货车从乙地到甲地要8小时。两车同时分别从两地出发相对开出，相遇时货车行了240km。甲乙俩地相距多少千米？

数学题解答：在路程一定的情况下，两车的速度比与时间比相反。

所以两车速度比是：客：货＝8:6=4:3

两车相遇时所行路程比也是4:3

所以，客车行了：240÷3×4=320（千米）

两地距离：240+320=560（千米）

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