Final answer:
To find the diameter of a circle with a known circumference, you use the formula for the circumference of a circle which is 'Circumference = πd', and isolate 'd'. In this problem, the diameter of a circle whose circumference is 220 cm is roughly 70.07 cm.
Step-by-step explanation:
The circumference of a circle is given by the formula: Circumference = πd, where d is the diameter of the circle. In this question, we know that the circumference is 220 cm. If we substitute this value into the formula, we get:
220 cm = πd
To find the diameter, we can rearrange this equation to be: d = 220 cm / π. Once we make this calculation we find that the diameter, or 'd', is roughly 70.07 cm.
Learn more about Circumference and Diameter