SOLUTION: how do you solve the surface area of a cone

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Question 269860: how do you solve the surface area of a cone
Answer by drk(1908) About Me  (Show Source):
You can put this solution on YOUR website!
The formula for surface area of a cone is
SA+=+pi%2Ar%5E2+%2B+pi%2Ar%2Al
where l = slant height