苏步青是我国著名的数学家,他青年时期留学日本时,在电车上碰到了一位数学家,这位数学家出了一道题让他解答:甲乙两人同时从两地出发,相向而行,距离是100千米。甲每小时行6千米,乙每小时行4千米。甲带着一条狗,狗每小时行10千米。这条狗同甲一道出发,碰到乙的时候,它就掉头朝甲这边跑;碰到甲时,它又掉头朝乙那边跑,直到两人相遇。这条狗一 Su Buqing is a famous mathematician in our country. When he was studying in Japan in his youth, he met a mathematician on the tram. The mathematician came up with a question to answer. A and B both proceeded from two places at the same time, It is 100 kilometers. A line of 6 kilometers per hour, B line 4 kilometers per hour. A with a dog, the dog runs 10 kilometers per hour. The dog started off with A. When she met B, she turned around and ran toward A and B. When she met A, she turned around and ran towards B until the two met. This dog one