Posted by **Ghanny** on Monday, April 12, 2010 at 6:37pm.

The base radius of a cone is 6 inches, and the cone is 8 inches tall. To the nearest square inch, what is the area of the lateral surface of the cone?

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**PsyDAG**, Tuesday, April 13, 2010 at 4:16pm
Total surface area = πrs + πr^2

Since πr^2 is the area of base, πrs = area of lateral surface.

Use Pythagorean Theorem to find s, the distance along the side from tip to base.

s^2 = h^2 + r^2

I'll let you do the calculations.

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