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51问答网 > 一个闹钟分针长5㎝，时针长4㎝，分针的针尖转一圈走过的路程是（）㎝，时针转一周扫过的面积是

一个闹钟分针长5㎝，时针长4㎝，分针的针尖转一圈走过的路程是（）㎝，时针转一周扫过的面积是

2025-04-04 16:27:50

推荐回答（4个）

回答1：

一个闹钟分针长5厘米,时针长4厘米,分针的尖端转一圈的长度是（31.4 ）厘米,时针转一周扫过的面积是（50.24）平方厘米.

回答2：

2＊3.14＊5=31.4；3.14＊4＊4=50.24

回答3：

用半径求周长和面积

回答4：

10π

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