Just for those who don't know a thing about cross sectional areas, I thought I'd explain.(adsbygoogle = window.adsbygoogle || []).push({});

A cross sectional area describes the area of a flat (2-dimensional) representation of a 3-dimensional object. So if I cut a cylinder, instead of seeing two circles, I see four circles (unless there are other circles in my environment). The cross-sectional area is the area of either of the two circles.

For a cylinder or right solid, the cross-sectional area is the area of the base.

For a sphere, the cross sectional area is the area of a circle with the same radius (pi*r^{2}).

For an ellipsoid, the cross sectional area is the area of an ellipse with the same long (a) and short (b) axes (pi*ab).

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# Cross sectional area (NOT A QUESTION)

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