Define the function for all . Let

Compute

- A(t);
- V(t);
- W(t);
- .

- The area of the ordinate set on is given by the integral,
- The volume of the solid of revolution obtained by rotating about the -axis is
- To compute the volume of the solid of revolution obtained by rotating about the -axis we first find as a function of .
Since , the integral is then from to 1 and we have

- Finally, using parts (c) and (d) we can compute the limit,