if the minute hand of the circular clock is 28 inches, that simply means its radius is 28.
[tex]\bf \textit{area of a circle}\\\\A=\pi r^2~~\begin{cases}r=radius\\[-0.5em]\hrulefill\\r=28\end{cases}\implies A=\pi 28^2\implies A=784\pi[/tex]
so it covers that much in 1 rotation, so in 4 rotations that'd be 4(784π) => 3136π.
