Question

The value of the circumference of circle A with a diameter of 27 cm is three times the value of the area of circle B. What is the radius of circle B

Answer 1

The answer is 3 cm.

Circle A's diameter is 27, right? However, circle A is 3 times the value of the area of B. Because of that, you need to do 27/3, the inverse, in order to get the diameter of circle B. 

Next, because radius is half of the diameter, you do 9 divided by 3 or 9 times 1/2.