Question

The radius of the base of a cone is 4 inches. the slant height of the cone is 6 inches. which is closest to the surface area of the cone?

Answer 1

The answer should be 125.66 inches.

So you know two things, the radius and the slant height.

The formula you are going to use is SA=π•r^2+π•r•L

SA= Surface Area
r = Radius
L= Slant Height

So now you plug the variables into the formula.


`\pi * {4}^(2) + \pi * 4 * 6`

`\pi * 16 + \pi * 24`

`40 * \pi = 125.66`
After just pick the answer closest to this one. And you should get the correct answer. :)