# Calculate volume of hollow cylinder

In next fields, kindly type the dimensions of your shape in the text box under title [ Unknowns: ]. After you type your value, click "CALCULATE" button; the answer will be automatically calculated and displayed in the text box under title [ Answer: ]. Also, you will be able to animate your shape through buttons under the below figure.

## How to Calculate Volume Of Hollow Cylinder

*Example: What is the volume of hollow cylinder with outer-radius = 26 units, inner-radius = 23 units and altitude = 30 units?*

As;

volume of hollow cylinder = π*((outer-radius)^{2}-(inner-radius)^{2})*altitude

By substituting the above given data in the previous function;

(i.e.) = π*((26)^{2}-(23)^{2})*30

Answer is: units^{3}.

*Practice Question: Calculate volume of hollow cylinder for the following problems:*

N.B.: After working out the answer of each of the next questions, click adjacent button of see the correct answer.

( i ) outer-radius = 29 units, inner-radius = 20 units and altitude = 34 units

( ii ) outer-radius = 27 units, inner-radius = 20 units and altitude = 42 units

( iii ) outer-radius = 25 units, inner-radius = 23 units and altitude = 47 units