A ‘volume of revolution’ is the calculation to compute the volume of a solid formed when a curve is rotated around an axis over a specified domain.
In the following applet, the function 
is defined on the domain 
.
Use the angle 
to rotate the curve 360 degrees around the 
axis.
These other functions work well on the axes given:
(type in sqrt(x) to the input box)
your own….