The circumference of the smaller circle is C = 2*pi*x/3.
We have given that radius ob measures x units
<h3>What is the formula for the circumference of the circle ?</h3>
circumference of the circle is given by,

where pi = 3.14
R= radius
we have two circles, A and B, where B is the larger circle and A is the smaller circle.
We know that,The circumference of B is 3 times the circumference of A.
The radius of circle B is OB = x
The radius of circle A is OA
We want to find an expression of OA.
The circumference of circle B is given by

The circumference of circle A is given by

we know that the circumference of circle B is 3 times the circumference of circle A,

replacing the equations for the circumferences

We have divide both sides by
we get:

Now we want to solve this for OA, then we need to isolate it,

We can conclude that the radius of the smaller circle is equal to x/3.
Then the circumference of circle A is

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