Solution:

Circumference of a circle = 2πr.

Given, circumference = 3.14 meters.

Therefore, 2πr = Circumference of a circle

or, 2πr = 3.14

or, 2 × 3.14r = 3.14,[Putting the value of pi (π) = 3.14]

or, 6.28r = 3.14

or, r = 3.14/6.28

or, r = 0.5

so the answer is 0.5