Question

Find the total surface area of this cone.

Answer 1

Answer:

$SA = 70\pi$

Step-by-step explanation:

Given

See attachment for cone

Required

The total surface area

This is calculated as:

$SA = \pi r\² + \pi rl$

From the attached cone:

$r = 5$ -- radius

$l = 9$ --- slant height

So, we have:

$SA = \pi * 5^2 + \pi * 5*9$

$SA = 25\pi + 45\pi$

$SA = 70\pi$