Annular Ring Calculator

Formula

The formula to calculate the Annular Ring (AR) is:

\[ AR = 2 \pi (R + r) \]

Where:

Annular Ring (AR): The circumference of the ring formed between the outer and inner radii.
Outer Radius (R): The radius of the outer circle.
Inner Radius (r): The radius of the inner circle.

Let's say the outer radius (R) is 10 inches and the inner radius (r) is 5 inches. Using the formula:

\[ AR = 2 \pi (10 + 5) \]

We get:

\[ AR = 2 \pi \times 15 = 94.25 \text{ inches} \]

So, the annular ring is approximately 94.25 inches.