SOLUTION: What is the total area of a cone with height 24, radius 7, and slant height 25?

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Question 143333: What is the total area of a cone with height 24, radius 7, and slant height 25?
Answer by mathgeek102(3) About Me  (Show Source):
You can put this solution on YOUR website!
The formula for the surface area of a cone is:
SA= pi r s + pi r squared
r=radius
s=slant height
pi r s = area of the cone
pi r squared = area of the base of the cone
add them together to get the TOTAL area, or surface area around of the cone
You do not need the height on the cone for surface area but for volume
Therefore:
SA= pi(7)(25) + pi(7)squared
SA= 125 pi + 49 pi
SA= 174 pi <- "exact number" using the symbol pi for an actual number
use your calculator (pi button) or use the number 3.14159...
Hope I helped!