[笔记][几何] 圆柱与方柱侧面积与体积之比 (The ratio of the side area to the volume of the cylinder and the square column)

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圆柱与方柱侧面积与体积之比,直接看下图。

The ratio of the side area to the volume of the cylinder and the square column.

 

由图可见:

(1)随着直径或者边长的增大,AS/V减小。

(2)直径为D的圆柱与边长为D的方柱,其AS/V是一样的。

(3) 直径为D的圆柱的体积或侧面积 只有 边长为D的方柱的体积或侧面积的0.785倍。


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