Chapter 6.4, Problem 1E

(Practice) The volume, v, and side surface area, s, of a cylinder are given by these formulas:

$\begin{array}{l}v=\pi r^{2}l\\ s=2\pi rl\end{array}$

r is the cylinder’s radius, and l is its length. Using these formulas, write and test a function named cylinder() that accepts a cylinder’s radius and length and returns its volume and side surface area.