In order to solve this, we just need to solve for L, because we are told what T is (3.2).
Here is how we set up the equation:

We can now solve for L. First, let's divide both sides by 2 pi. Now, our equation is:

Now, we square both sides to get rid of the square root. This is equal to:

Now, we have 0.2594 = L/980. We finish the problem by multiplying both sides by 980. This becomes
254 = L.
So, the answer is C, 254 centimeters.