A conical frustum is a Frustum created by slicing the top off a Cone (with the cut made parallel to the base).
For a right circular Cone, let be the slant height and and the top and bottom Radii.
The Volume of the frustum is given by
See also Cone, Frustum, Pyramidal Frustum, Spherical Segment
Beyer, W. H. (Ed.) CRC Standard Mathematical Tables, 28th ed.
Boca Raton, FL: CRC Press, pp. 129-130 and 133, 1987.
© 1996-9 Eric W. Weisstein