一题多解，既可以提高同学们分析、解决问题的能力，又可以开拓思维，发展智力．现以一道山西省１９９６年中考应用题为例，给出多种解法，供学习时参考．题：某校师生到距学校２０千米的公路旁植树，甲班师生骑自行车先走，４５分钟后，乙班的师生乘汽车出发，结果两班师生同? Multiple solutions to one question can not only improve the students’ ability to analyze and solve problems, but also develop thinking and develop intelligence. A case study of Shanxi province’s 1996 entrance exam was taken as an example to give various solutions for reference during learning. Question: A certain school teacher and students plant trees next to the road 20 kilometers away from the school. Teachers and students of Class A ride bicycles first. After 45 minutes, Class B teachers and students set off by car. As a result, both teachers and students have the same class?