Question

find the radius and area of a circle whose circumference is 18 pi cm

Answer 1

2$\pi$r = 18 $\pi$
2r =18
r = 9cm

area of a circle = $\pi$ r^2
                         = 22/7 x 9 x9
                         = 254 . 571 cm^2

Answer 2

Here is your answer.