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What is the exact circumference of a circle with a radius of 15 cm?

A: 10π cm
B: 15π cm
C:30π cm
D: 60π cm

Respuesta :

Answer:

C:30π cm  

Step-by-step explanation:

The formula for the circumference of a circle is

C = 2πr

Since the radius is 15 cm, this makes 2r = 2(15) = 30 cm.  This makes the circumference

C = 30π cm

JeanaShupp

Answer: C: 30π cm

Step-by-step explanation:

The circumference of a circle is given by :-

[tex]C= 2\pi r[/tex] , 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 :-

[tex]C= 2\pi (15)\ cm\\\\\Rightarrow\ C=2\times15\pi\ cm\\\\\Rightarrow\ C=30\pi \cm[/tex]

Therefore, the exact circumference of a circle with a radius of 15 cm = [tex]30\pi \cm[/tex]

Thus , the correct option is C: 30π cm