SOLUTION: The total surface area of a right circular cylinder is 294π square inches. If the altitude of the cylinder is twice the length of a radius, find the altitude of the cylinder.

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Question 182582: The total surface area of a right circular cylinder is 294π square inches. If the altitude of the cylinder is twice the length of a radius, find the altitude of the cylinder.
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
The total surface area of a right circular cylinder is 294π square inches. If the altitude of the cylinder is twice the2.28 radius, find the altitude of the cylinder.
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A+=+2%2Api%2Ar%5E2+%2B+2pi%2Ar%2Ah
294+=+2%2Api%2Ar%5E2+%2B+2pi%2Ar%2A2r
294+=+2%2Api%2Ar%5E2+%2B+2pi%2Ar%2A2r
2pir*(r + 2r) = 147
6pir%5E2+=+147
r%5E2+=+49%2F3pi
r = ~ 2.28 inches
h = ~ 4.56 inches