If you have a truncated cone such that its upper base has a radius of a and the radius of its [larger] lower base is b, and a height h (between bases), how could you figure out its surface area using geometric reasoning?
(In reply to
re: general equation: by Richard)
Actually I did it by integration and came up with the same formula as Ady. I can't see how its wrong....

Posted by Jils
on 20040126 06:51:04 