To find the diameter of a circle given its circumference, you can use the formula:
\[ C = \pi d \]
where \( C \) is the circumference and \( d \) is the diameter. Rearranging this formula to solve for the diameter gives:
\[ d = \frac{C}{\pi} \]
Given that the circumference \( C \) is approximately 574 meters and using \( \pi \) as 3.14, you can calculate the diameter as follows:
\[ d = \frac{574}{3.14} \]
Now, performing the division:
\[ d \approx 183.3 \]
So, the diameter of the circle, rounded to the nearest tenth, is approximately 183.3 meters.