function value = cone_volume_3d ( r, h )

%% CONE_VOLUME_3D returns the volume of a cone in 3D.
%
%  Modified:
%
%    20 May 2004
%
%  Author:
%
%    John Burkardt
%
%  Parameters:
%
%    Input, double precision R, the radius of the base of the cone.
%
%    Input, double precision H, the height of the cone.
%
%    Output, double precision CONE_VOLUME_3D, the volume of the cone.
%
  value = ( pi / 3.0 ) * h * r * r;