Posted by crystal on Sunday, May 16, 2010 at 9:15am.
The volume of a cone is (1/3) pi r^2 h
You forgot the 1/3 factor in that formula.
The area of the side of a cone is
A = pi c^2*(r/c) = pi*r*c
where c is the slant height.
For the total cone area, you must add the bottom, pi r^2.
the question was about a cylinder not a cone which is a different formula. thanks.
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