Winds do in fact extend up to 70 miles from the center.

Because we're dealing with a circle - that means...
(1/2 diameter or radius times pi = area)
20^2*pi = ~1250 sq mi area
35^2*pi = ~3850 sq mi area

Indeed - Colleen is wrong - it's not twice as large an area - it's more than three times the area...

Even though the windfield is not a perfect circle, the area is going to be most accurately represented by that good ol' fashion formula.

Pity I couldn't use HTML - then I'd be able to make that forumla look better

Up for water - off to bed now.

See you guys on the other side.

Bah - realized too late that colleen is further right...

revised though...

40^2*pi = ~5000 sq mi
70^2*pi = ~15000 sq mi

Still the same 3x increase - only a much larger area.