Answer: 30,000m^2
Explanation:
The formula for the area of a circle is pi*r^2. Knowing that d = 2r, we can conclude that the radius is 100m after simple algebra, and we are given that pi = 3. This makes our equation:
A = 3*100^2
A = 30,000
This means that the area of the piece of land is roughly 20,000m^2.