Question

Find the total surface area of this cone.

Leave your answer in terms of .
25m
Sm
SA = [? ]7 m2

Answer 1

`SA = 70\pi`

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`