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阿Q吧 > 将一根底面直径为4dm的圆柱形木料，沿直径切成体积相等的两块，表面积增加了600平方分米。

将一根底面直径为4dm的圆柱形木料，沿直径切成体积相等的两块，表面积增加了600平方分米。

这根木料的体积是多少立方分米？

2025-03-17 02:16:19

推荐回答（3个）

回答1：

增加的是两个长方形的面积，长方形的长是圆柱的长，宽是圆柱的底面直径
木料长 600÷2÷4＝75dm
木料体积（4/2)²×3.14×75＝942（立方分米）

回答2：

沿直径切割增加的是两个长方形面积，先求出一个面积：600/2=300平方分米，再求出圆柱的高：300/4=75分米，体积：3.14*2的平方再乘以75等于942立方分米

回答3：

300立方分米

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