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Width of a Ring (Annulus)
w = R − r
Where: R = outer radius, r = inner radius, w = Width
Use the same units for all lengths (e.g. all in cm); areas come out in cm², volumes in cm³.
Solved example
Given: R = 7, r = 5
Find: w (Width)
- Formula: w = R - r
- Substitute the values: w = -5 + 7
- Result: w = 2
Answer: w = 2
Calculator
How to calculate Width of a Ring (Annulus)
- Write down the formula: w = R − r.
- Note the known values (R, r).
- Substitute them and simplify to find w.
- Use the calculator above to solve for any letter.
Frequently asked questions
What is the formula for Width of a Ring (Annulus)?
The formula is w = R − r, where R = outer radius, r = inner radius, w = Width.
What is Width of a Ring (Annulus) when R = 7, r = 5?
w = 2. Substitute the values into w = R − r and simplify.