Answer
$A=12.6~ft^{2}$.
Work Step by Step
To find the area of the tank's lid, we use the formula for the area of a circle:
$A=\pi*r^{2}$.
where
$r=24in$
Therefore, we have:
$A=\pi*(24in)^{2}=1,809.56in^{2}=1,809.56/144~ft^2=12.57ft^{2}\approx 12.6~ft^2$.
where we used the fact that there are 144 square inches in one square foot.
