Question

Circle O has a circumference of 36π cm.

Answer 1

Answer:-Thus radius of circle O=18 cm

Explanation:-

Circumference is the distance around the circle.

Circumference of circle $=2\pi\ r$, wherer is the radius of the circle.

Given: Circumference of circle O$=36\pi\ cm$

$\\\Rightarrow2\pi\ r=36\pi\\\Rightarrow\ r=18\ cm...........[\text{dividing }2\pi\text{ on both sides}]$

Thus radius of circle O=18 cm

Answer 2

C=2piR
R=18cm if you solve the equation