Tube in a Sphere
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A cylindrical tube is inserted in a sphere. You can produce partial tubes and spheres in various ways. The volume of the remaining part of the sphere is , which is the volume of a sphere of radius , where is half the length of the tube.
Contributed by: Sándor Kabai (October 2008)
Additional contributions by: Ed Pegg Jr
Open content licensed under CC BY-NC-SA
Volume explained by Andrew DeBenedictis here.