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What is the surface area of the cone?

What is the surface area of the cone?-example-1

1 Answer

1 vote

Answer: C

Explanation:

To find the surface area of a cone, you use the formula
A=\pi r(r+√(h^2+r^2) ). Since we are already given the height and radius, all we have to do is plug in the values and solve.


A=9\pi (9+√(41^2+9^2) ) [solve inside of square root]


A=9\pi (9+√(1762) ) [parenthesis]


A=9\pi (50.976 ) [multiply]


A=458

Therefore, the closest answer is C.

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