Given data:
The given radius of the circular window is,
[tex]r=3\frac{1}{2}\text{ ft}[/tex]
The expression for the area of the window is,
[tex]A=\pi r^2[/tex]
Substitute the given value in the above expression.
[tex]\begin{gathered} A=\frac{22}{7}(3.5ft)^2 \\ =38.5ft^2 \end{gathered}[/tex]
Thus, the area of window is 38.5 ft^2.
