Posted by B.B. on Sunday, September 6, 2009 at 11:37am.
I am not certain what you mean by similar?
Same diameter, different heights?
Same ratio changing height and diameter?
Are you considering surface area to include the ends?
If the same ratio is changing height and diameter is 1:3, then
SA=2PIr^2 + 2PIr(h) and if r and h are increased by three, then SA changes by a factor of nine.
So then the answer is it suppose to be 1:27 or 1:9?
Thanks.
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