Question

Find the surface area of the cone in terms of π.

144π ft2


396π ft2


252π ft2


540π ft2

Answer 1

The answer to your problem is, 1364.21 or C. 252π ft2

Explanation:

Here is our formula and what we will be using:

A = π r ( r +
`√(h^2 + r^2)`

Radius = 12

Height = 21

Area = π r l + π
`r^2`

Length =
`√(r^2 + h^2)`

A = π r ( r +
`√(h^2 + r^2)` = π x 12 x ( 12 +
`√(21^2 + 12^2)`

= 1364.20921 or 1364.21

Thus the answer to your problem is, 1364.21 or C. 252π ft2