The equations are
,
,
and
.
The volume of the solid generated revolving about the
-axis.
Disk method:
.
Here radius
.
Integral limits are
and
.


cubic units.
Verify the result by using graphing utility.
\Graph the integrand
.
Find the integral of the function
.
.gif\")
Observe the graph:
\Therefore, the integral value is
.
Volume of the region:
\
Thus, the volume of the region is verified graphically and both the results are same.
\
cubic units.