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## Homework Statement

Develop a formula for radius as a function of surface area for a cone with height three times its diameter.

## Homework Equations

∏rs + ∏r^2 = SA

s = √(h^2+r^2)

H = 3d or 6r

## The Attempt at a Solution

Dont know what values to use for s = √(h^2+r^2).

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