How to find the surface area of a cone

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ISEE Upper Level Quantitative Reasoning › How to find the surface area of a cone

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What is the surface area of a cone with the following measurements?

$5+16\pi$

$5+8\pi$

$5+64\pi$

$5+4\pi$

The surface area of a cone can be found with the following equation:

$SA=\frac{1}{2}h+r^2\pi$

$SA=\frac{1}{2}(10)+4^2\pi=5+16\pi$