Question

Write an algebraic expression which represents the volume of a cylinder whose radius is 3k and height is 2k + 1.

Answer 1

\[Vc=\pi r^2h\]
\[V_c=\pi (3k)^2(2k+1)\]
\[V_c=9\pi(2k+1) k^2\]
which is the desired algebraic expression in variable\[k\]