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15问答网 > 把一根长1米的圆柱形钢材截成2段后,表面积增加了6.28平方分米,这根钢材原来的体积

把一根长1米的圆柱形钢材截成2段后,表面积增加了6.28平方分米,这根钢材原来的体积

是多少？急急急急急啊啊

2025-03-24 03:15:22

推荐回答（3个）

回答1：

表面积增加了6.28平方分米的意思是这根圆柱的底面积是6.28的二分之一：3.14平方米，3.14乘于10分米等于31.4立方分米。这根钢材原来的体积是31.4立方米。

回答2：

6.28÷2×10就OK了

回答3：

一面3.14dM2.用3.14。乘1M等于5dm，3.14乘5等于15.7dm3

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