Geometry
posted by JOY .
A cylinder has a volume of 200in^3 Determine the volume of a cone whose radius and height are equal to that of the cylinder.

Volume of a cylinder = pi*(r^2)*h
r=h
http://math.about.com/od/formulas/ss/surfaceareavol_3.htm
Substitute r for h and solve for h, which is also equal to r. Then, substitute the values into the equation of volume of a cone.
volume of a cone= 1/3 pi*(r^2)*h
http://math.about.com/od/formulas/ss/surfaceareavol_2.htm 
200