数学题：东西、南北两条路交叉成直角，甲距路中心1500米，乙在路中心，甲由南向北，乙由西向东，同时行走。5分钟后，甲尚未走到路口，两人离路口的距离相等，又走45分钟后两人离路口又一样。甲乙两人每分钟各行多少米？

数学题解答：这题需要求两个未知数，可以尝试用方程解。

设甲的速度是每分钟走x米，乙的速度可以表示为(1500-5x)÷5。

根据“又走45分钟后两人离路口又一样”来列方程。一共走了：45+5=50（分钟）

50x – 1500 = (1500-5x)÷5 ×50

50x -1500 = 15000 – 50x

100x = 16500

x=165

乙的速度：(1500-165×5)÷5＝135。

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