the circumference of the circle is,
2 x pi x r = 18 x pi
r = 18/2
r = 9
so the radius of the circle is 9
we know that the area of the circle is,
[tex]A=\pi\times r^2[/tex]put the value r = 9
[tex]\begin{gathered} A=\pi\times9^2 \\ A=81\times\pi \end{gathered}[/tex]the area of the circle is 81 pi
thus the answer is option A
