甲骑摩托车每小时行40km,乙骑机动脚踏车每小时行20km,上午七时他们从相距140千米的a、b两地同时出发相向而行,在什么时候他们相距20千米?同向而行,在什么时候他们相距20千米?
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/09 15:55:38
![甲骑摩托车每小时行40km,乙骑机动脚踏车每小时行20km,上午七时他们从相距140千米的a、b两地同时出发相向而行,在什么时候他们相距20千米?同向而行,在什么时候他们相距20千米?](/uploads/image/z/2779390-46-0.jpg?t=%E7%94%B2%E9%AA%91%E6%91%A9%E6%89%98%E8%BD%A6%E6%AF%8F%E5%B0%8F%E6%97%B6%E8%A1%8C40km%2C%E4%B9%99%E9%AA%91%E6%9C%BA%E5%8A%A8%E8%84%9A%E8%B8%8F%E8%BD%A6%E6%AF%8F%E5%B0%8F%E6%97%B6%E8%A1%8C20km%2C%E4%B8%8A%E5%8D%88%E4%B8%83%E6%97%B6%E4%BB%96%E4%BB%AC%E4%BB%8E%E7%9B%B8%E8%B7%9D140%E5%8D%83%E7%B1%B3%E7%9A%84a%E3%80%81b%E4%B8%A4%E5%9C%B0%E5%90%8C%E6%97%B6%E5%87%BA%E5%8F%91%E7%9B%B8%E5%90%91%E8%80%8C%E8%A1%8C%2C%E5%9C%A8%E4%BB%80%E4%B9%88%E6%97%B6%E5%80%99%E4%BB%96%E4%BB%AC%E7%9B%B8%E8%B7%9D20%E5%8D%83%E7%B1%B3%3F%E5%90%8C%E5%90%91%E8%80%8C%E8%A1%8C%2C%E5%9C%A8%E4%BB%80%E4%B9%88%E6%97%B6%E5%80%99%E4%BB%96%E4%BB%AC%E7%9B%B8%E8%B7%9D20%E5%8D%83%E7%B1%B3%3F)
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