SOLUTION: What is the lateral surface area of the stair well? http://imgur.com/GJu5XXI

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Question 1028951: What is the lateral surface area of the stair well?
http://imgur.com/GJu5XXI
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!

Lateral area = 2 pi r h
Top one
2*pi*18*18
=2035.75 in^2...............A

Bottom one
Lateral Area = 2 * pi * r*h
=2*pi*36*18
=4071.50 in^2...........................B
Add them up
Area = pi*(r1^2-r2^2)
=pi *54*18
=3053.63 in^2..........................C
Add all the three values . Not too sure if you need to add C