Posted by **Samantha** on Monday, April 9, 2012 at 2:12pm.

I need to find the approximate surface area of a cone with the R=5 and L=6. I thought I figured it out by 3.14(5)(6) which will give me 94.2 I then would take 94.2 +3.14(5)squared and I came up with 172.7, but my answer should be either 20m squared, 98m squared, 118m squared or 67m squared, what did I do wrong?

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