> Maybe it's been too long for me, but I can't figure out what kind of
> area equation needs to have two multiplications. And I can't figure
> out what b, y, and m stand for.

I am solving for the area of flow in a trapezoidal shaped ditch 
(channel). b is bottom width, y is depth of flow, and m is the side 
slope as m:1.

You know, I didn't think of area1 = Geom.new(b, y, m).area

I guess that isn't too bad.
-- 
Posted via http://www.ruby-forum.com/.