W 3.1
Volume of Revolution - Disks
Use slider n to change the number of partitions. You can enter a new function in the box provided, try several different functions to see the impact on the volume. You can also adjust the interval [a,b]. At the right are the approximate values based on the number of subdivisions as well as the actual volume using an integral.
You can see different views of the solid by dragging the axis in the 3D window.