Answer:
47.1 cm
Step-by-step explanation:
For this problem, I'll use an approximation of , which is good enough for the level of accuracy we need. The definition of π itself is given by the equation
where c is the circumference of a circle and d is its diameter. If we want to find the circumference, we can simply multiply both sides of that equation by d to get the formula
Here, we're given d = 15 cm, so plugging that in, we find our circumference to be
So the circumference of this circle is approximately 47.1 cm.