Answer:-Thus radius of circle O=18 cm
Explanation:-
Circumference is the distance around the circle.
Circumference of circle [tex]=2\pi\ r[/tex], wherer is the radius of the circle.
Given: Circumference of circle O[tex]=36\pi\ cm[/tex]
[tex]\\\Rightarrow2\pi\ r=36\pi\\\Rightarrow\ r=18\ cm...........[\text{dividing }2\pi\text{ on both sides}][/tex]
Thus radius of circle O=18 cm
