The circumference of a circle can be found using the formula C = πd, where C is the circumference and d is the diameter.
Given that the diameter is 3.25 meters, the circumference can be calculated as:
C = 3.14 * 3.25 = 10.205 meters
Rounded to the hundredths place, the estimated circumference is 10.21 meters.
Therefore, the correct answer is 10.21 meters.