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A frustum of a cone is that part of the surface of a cone between two planes perpendicular to the axis of the cone; if a cone has base radii r1 and r2 and slant height h, then its area, A is given by
A = 2*pi*h*(r1+r2)/2
cited from Varberg and Purcell's Calculus textbook, 9ed.; p299.
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Earn +20 ptsQ: What is the average cross sectional area of a frustum of a cone?
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