Answer
$326.7$ square feet
Work Step by Step
$r=\frac{diameter}{2}=12.$
A sector with acentral angle measure of $100^o$ was removed, hence the angle covered by the tent will be $360^o-100^o=260^o.$
The area of sector can be computed by the formula:
$K=\frac{\theta}{360}\cdot \pi \cdot r^2$,where $\theta$ is in degrees,
Hence,
$K_1=\frac{260}{360}\cdot \pi \cdot 12^2\approx326.7$ Square feet
