SOLUTION: the total area of a cylinder is 40pi. If h=8, find r.
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Question 1104057: the total area of a cylinder is 40pi. If h=8, find r.
Answer by greenestamps(13200) (Show Source): You can put this solution on YOUR website!
Given that the height is 8, the total surface area is
Given that the total surface area is 40pi,
[dividing out the common factor 2pi]
r = -10 or r=2; since this is the radius of the cylinder, we reject the negative solution.
The radius of the cylinder is 2.
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