The radius of the right circular cone is and height is
.
The line is revolving about the -axis.
The slope of the line equation is .
The line equation is in the form of .
Substitute .
.
The line equation passes through the point .
.
The curve equation is .
The outer radius of the right circular cone is .
The limits of the cone are to
.
Disk method:
\The volume of the solid is .
Substitute ,
and
.
.
The volume of the right circular cone is .
The volume of the right circular cone is .