Answer:
25[tex]\pi[/tex]
Step-by-step explanation:
Looks like a quarter of a circle so you'd probably want to use the circle formula, [tex]\pi r^{2}[/tex], but at the end divide by 4 because its only one quarter of it.
The radius is 10, not 5 since the section is already cut out.
so we go 10^2 = 100
100*[tex]\pi[/tex]
100[tex]\pi[/tex] then divided by 4
[tex]\frac{100\pi }{4} =25\pi[/tex]
and you can multiply those together if ya want but that's the most exact answer
