The radius of the sphere is
.
Observe the diagram:
\The outer radius of the right circular cone is
.
Find he volume of the solid above the plane.
\The limits of the are
to
.
Disk method:
\The volume of the solid is
.
Substitute
,
and
.







.
The volume of the sphere above the plane is
.
The volume of the sphere above the plane is
.