The top and bottom radius of a conical frustum are 1 cm and 4 cm by each,
the central angle of the slant surface is 216 degrees,
what is the volume of the conical frustum?

ConeDimensions_1000.gif
The model is defined as

class ConicalFrustumByTwoCones
{
factor angle, volume;
Cone m, n;

angle = m.slant.angle = n.slant.angle;
m.t.A = n.t.A;

volume = n.volume - m.volume;
}

Query is made as

select volume from ConicalFrustumByTwoCones
where angle=216/PI, m.bottom.r=1, n.bottom.r=4

The volume is around 3.49 cubic centimeters.

Last edited May 24, 2009 at 2:18 PM by samhuang, version 2

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