Question $3(25$ points$)$:

A torus is the geometric name for a three$-$dimensional circular ring. The ring of a

basketball hoop is a torus with an outer radius $(R)$ of $9$ inches and an inner radius

$($r$)$ of $1\mathrm{.}6$ centimeters. Hoops are typically made of steel $($density $=489\mathrm{.}84lb\frac{m}{?}$

$f{t}^3).$ The equation for the volume $(V)$ of a torus is given by the following

equation.

$V=2{}^{2}R{r}^2$

What is the weight of a basketball hoop in pounds$-$force?

Remember: density $=$ mass$/$volume$!$