Originally posted by warmonger:
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A true circle will have the best ratio of cross sectional area to surface area which approaches 9.0
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I have to edit this and its too late, but this statement is true but the ratio equaling 9 is only in the case of a cylinder the same size. This is only usefull for comparing this particular problem I think. Sorry for any confusion.

Former owner of '99 CSVT - Silver #222/2760 356/334 wHP/TQ at 10psi on pump gas! See My Mods '05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red '06 Mazda5 Touring, 5spd,MTX, Black