The circumference of a circle varies directly with the diameter. If a circle with a diameter of 6 has a circumference of 18.84 , then the diameter of a circle with circumference of 6.28 is

Step 1 ：The relationship between the circumference and diameter of a circle is given by the formula \(C = \pi d\), where \(C\) is the circumference and \(d\) is the diameter.

Step 2 ：We are given that a circle with a diameter of 6 has a circumference of 18.84. This gives us the value of \(\pi\) as \(\frac{18.84}{6} = 3.14\).

Step 3 ：We can use this value to find the diameter of a circle with a circumference of 6.28 by rearranging the formula to \(d = \frac{C}{\pi}\).

Step 4 ：Substituting the given values into the formula, we get \(d = \frac{6.28}{3.14} = 2.0\).

Step 5 ：Final Answer: The diameter of a circle with a circumference of 6.28 is \(\boxed{2}\).