Solution
For this case the area is given by
[tex]A=\pi(r)^2[/tex]
The radius is given by:
r= 5
And solving we got:
[tex]A=\pi(5)^2=25\pi[/tex]
And the area for one quadrant we got:
[tex]A=\frac{25\pi}{4}[/tex]
For two quadrants is:
[tex]A=\frac{25\pi}{2}[/tex]
