What is the circumference of a circle with a diameter of 30 centimetres?

15

60

90

50

90 because it's closest to the real answer

90 or option C

Step-by-step explanation:

The formula for finding the circumference of a circle is C = πd

So all we have to do is substitute 30 centimeters for our d.

30 * π ≈ 94.25.

That's closest to 90.

Therefore, 90 or option C is our answer.