In geometry, the napkin-ring problem involves finding the volume of what remains after a circular hole is drilled through a sphere. Specifically, the hole has the shape of a right circular cylinder (with two spherical caps) whose axis goes through the center of the sphere.
In geometry, the napkin-ring problem involves finding the volume of what remains after a circular hole is drilled through a sphere. Specifically, the hole has the shape of a right circular cylinder (with two spherical caps) whose axis goes through the center of the sphere.
Source: Wikipedia "Napkin ring problem" · CC BY-SA 4.0
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