Volume of a barrel
http://dmentrard.free.fr/GEOGEBRA/Maths/voltonMD.html (long to open)
[url=http://dmentrard.free.fr/GEOGEBRA/Maths/voltonMD.html ]http://dmentrard.free.fr/GEOGEBRA/Maths/voltonMD.html [/url]
Information: Volume of a barrel