Question

What is the surface area of a cone with a radius of 8 centimeters and a slant height of 12 centimeters? Use three point one four for pi.

five hundred two point four square centimeters
seven hundred fifty-three point six square centimeters
eight hundred three point eight four square centimeters
one thousand four point eight square centimeters

Answer 1

The equation for the surface area of a cone is:

\[A=\pi r(r+ l)\]
Where r is the radius and l is the slant height. Plugging in your values will give you the answer!

Answer 2

Thanks ! I kinda sorta understand now....