#### Answer

$\approx$ 1256 $ft^{2}$

#### Work Step by Step

Given A circular grass courtyard at a shopping mall has a 40-ft
diameter. This area needs to be reseeded
To find the total area to be reseeded
We know the area of the circle which has radius r = $\pi r^{2}$
Area of circle = $\pi (\frac{40}{2})^{2}$
= $\pi (20)^{2}$
=400$\pi$
=1256.63 $ft^{2}$
$\approx$ 1256 $ft^{2}$