Answer: C: 30π cm
Step-by-step explanation:
The circumference of a circle is given by :-
\(C= 2\pi r\) , where r is the radius of the circle.
We are given that : The radius of the circle = 15 cm
then , the circumference of the circle will be :-
\(C= 2\pi (15)\ cm\\\\\Rightarrow\ C=2\times15\pi\ cm\\\\\Rightarrow\ C=30\pi \cm\)
Therefore, the exact circumference of a circle with a radius of 15 cm = \(30\pi \cm\)
Thus , the correct option is C: 30π cm
