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这一道数学附加题答案锧过程

2025-03-25 04:27:12

推荐回答（2个）

回答1：

这个居然是附加难题？很简单啊，展开来说就是相遇问题；设他们相遇时走过时间为t分钟；则
S为长方形周长=50t+40t；50t-40t=贝贝比丽丽多走的距离；长方形右下B点为两条线路的中间点；贝贝比丽丽多走了20+20=40m则40=50t-40t得出t=4即S=(50+40)t=360m.此题是求不出长方形的长和宽，但能求出长+宽；不要动脑筋想这个否则走入死胡同。

回答2：

图要拍完整啊，亲

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