### Assignment #8

**Due: 1 March, 1999**

Read Sections 8.2 and 8.3 in the text and do the following problems:
**1.** Find the total arc-length of the circle with equation (x-R)^{2} + y^{2} = r^{2}, where r and R are constants with 0 < r < R. *[5]*

**2.** Find the surface area of the torus obtained by rotating the circle in problem **1.** about the y-axis. *[5]*

Department of Mathematics
Trent University

Maintained by Stefan Bilaniuk. Last updated 1999.12.03.