# Thread: Surface Area Challenge HELP

1. ## Surface Area Challenge HELP

I'm not good at Surface Area, and I really need to figure out how to do this. :[
Can someone work it out step by step?

MUCH APPRECIATED!! <33

Problem:
You have been hired to paint the Greensboro, Ga. historic water tower green.

The tower has a cylindrical base that is 12 feet around and 85 feet high. The top is sphere and is 300 feet around.

A gallon can of green paint on average covers 200 ft2(feet squared) and cost about $35 per gallon. How much would it cost to paint the entire water tower? 2. Originally Posted by Alchemist9 I'm not good at Surface Area, and I really need to figure out how to do this. :[ Can someone work it out step by step? MUCH APPRECIATED!! <33 Problem: You have been hired to paint the Greensboro, Ga. historic water tower green. The tower has a cylindrical base that is 12 feet around and 85 feet high. The top is sphere and is 300 feet around. A gallon can of green paint on average covers 200 ft2(feet squared) and cost about$35 per gallon.

How much would it cost to paint the entire water tower?
you'll need the following two formulas ...

surface area of a sphere ... $A = 4\pi r^2$

lateral surface area of a cylinder ... $A = 2\pi rh$

3. Originally Posted by skeeter
you'll need the following two formulas ...

surface area of a sphere ... $A = 4\pi r^2$

lateral surface area of a cylinder ... $A = 2\pi rh$
Well.. I originally did that when I tried it out the first time.

I feel like my numbers weren't.. really right.
They were really indifferent.

4. Originally Posted by Alchemist9
Well.. I originally did that when I tried it out the first time.

I feel like my numbers weren't.. really right.
They were really indifferent.
... since you haven't shown what you have attempted, I guess we'll never know if you did it correctly or made a mistake.

get my point?