Question

What is the surface area of the cone?

Answer 1

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.