How to show that:
\(V= \frac{4A\sqrt{A}\varpi }{3\varpi}\)
If you are looking for a method or proof of the derivation of Volume of a sphere, there are lots of them on the Inrenet: Here is one that is simple and does not involve advanced Math:
http://mathcentral.uregina.ca/qq/database/qq.09.01/rahul1.html
No this is actually a problem I have to solve and I can't seem to get it right.
+12 
