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85问答库 > 一根圆柱形木料长2米，把它按5：3截成两段后，表面积增加了18.84平方厘米。截成后较长的一段的体

一根圆柱形木料长2米，把它按5：3截成两段后，表面积增加了18.84平方厘米。截成后较长的一段的体

2025-04-07 19:29:26

推荐回答（1个）

回答1：

由题意：

增加的表面积是2个底面积的大小

所以：

底面积=18.84÷2=9.42平方厘米

2米=200厘米

较长一段的体积
=9.42×[200÷（5+3）×5]
=9.42×125
=1177.5立方厘米

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