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A cylinder has a surface area of 339cm2. The radius is two times greater than the height. What is the radius of the cylinder? Answer to the nearest cm.
 Jun 10, 2012

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r: radius
h: height

Area=2*pi*r*(r+h)

339=2*pi*r*(r+h)
r=2*h
[input]solve( 339=2*pi*r*(r+h), r=2*h )[/input]

{r=5.997417539138687, h=2.998708769569344}
 Jun 10, 2012

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