Final answer:
The rim's diameter is approximately 6 centimeters.
Step-by-step explanation:
To find the rim's diameter, we can use the formula for circumference of a circle: C = πd. We are given that the circumference is 18.84 centimeters, so we can substitute this value into the formula: 18.84 = 3.14d. To solve for d, we divide both sides of the equation by 3.14: d = 18.84/3.14. Evaluating this expression, we find that the rim's diameter is approximately 6 centimeters.