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[问与答] chatgpt 和老师，谁是对的？

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一道小学数学题，ch­a­t­g­pt 认为答案是 24 ，老师认为答案是 20+pi ，理由是 需要考虑转角是圆的。 问了另外一个 cl­a­u­de so­n­et ，答案也是 24 。 到底老师是对的，还是 ch­a­t­g­pt 是对的？搞不懂了。大家怎么看

原题为：

一个长方形花坛，长是宽的 1.5 倍。如果长增加 2 米，宽减少 1 米，面积不变。

a)列方程求解原来的长和宽(12 分)

b)如果要在这坛周围铺设一圈 1 米宽的人行道，求人行道的面积(8 分)

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