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58问答库 > 一根圆柱形水管,内直径为20厘米,水在管内的流速是每秒40厘米,每秒流过的水是多少升？

一根圆柱形水管,内直径为20厘米,水在管内的流速是每秒40厘米,每秒流过的水是多少升？

2025-04-01 05:22:47

推荐回答（2个）

回答（1）：

3.14×﹙20÷2﹚²×40＝12560（立方厘米）
12560立方厘米＝12560毫升＝12.56升
答：每秒流过的水是12.56升。

回答（2）：

3.14×20/2×20/2×40=3.14×4000=12560立方厘米

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