SOLUTION: What is the height of a cylinder whose surface area is 282.6 square inches and whose radius is 3 inches?

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Question 251516: What is the height of a cylinder whose surface area is 282.6 square inches and whose radius is 3 inches?
Found 2 solutions by checkley77, richwmiller:
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
A=2PIRH+2PIR^2
282.6=2*3.14*3*H+2*3.14*3^2
282.6=18.84H+56.52
282.6-56.52=18.84H
226.08=18.84H
H=226.08/18.84
H=12 INCHES IS THE HEIGHT.

Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
A=2*pi*r*h
if the surface area does not include the ends of the cylinder
282.6=2*pi*3*h