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58问答库 > 周长三十米,半径十五米,高二米,厚二十公分的混凝土,要多少立方

周长三十米,半径十五米,高二米,厚二十公分的混凝土,要多少立方

2025-04-08 07:47:11

推荐回答（1个）

回答（1）：

周长与半径不配套，周长30米，半径就只有4.78米。半径为15米，则周长为102.3米。
如周长30米正确，则混凝土用量为30*2.5*0.2=15方；
如果半径15米正确，则周长为102.3m,混凝土为：102.3*2.5*0.2=51.2方

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