How to Find Area of Hollow Cylinder?
Let’s take an example to understand how to calculate the area of a hollow cylinder.
Example: Calculate the area of a hollow cylinder whose external radius is 12 cm, the internal radius is 9 cm, and the height is 7 cm.
Solution:
Step 1: Note the values of the given dimensions. Here, the external radius (R) is 12 cm, the internal radius (r) is 9 cm, and the height (h) is 7 cm.
Step 2: We know that the formula to find the area (TSA) of a hollow cylinder is [2πh (R + r) + 2π(R² – r²)] square units. Now, substitute the given values in the formula.
Step 3: Thus, the area of a hollow cylinder is calculated as
TSA = 1319.469 Square Meters
Area of Hollow Cylinder
A hollow cylinder is a 3D shape that’s empty inside with some thickness around the edges. The formula for its total surface area (TSA) is:
TSA of Hollow Cylinder = 2πh (R + r) + 2π(R² – r²)
Here are formulas for other areas of a hollow cylinder:
- Lateral Surface Area (LSA): 2πh (R + r)
- Cross-Sectional Area: π(R2 − r2)
where,
- R is Radius of Outer Circle
- r is Radius of Inner Circle
Table of Content
- What is Hollow Cylinder?
- Area of Hollow Cylinder Formula
- Curved Surface Area of Hollow Cylinder
- Total Surface Area of Hollow Cylinder
- How to Find Area of Hollow Cylinder?
- Questions on Area of Hollow Cylinder
- Examples of Hollow Cylinder
- FAQs on Hollow Cylinder