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\u00a9 2021 wikiHow, Inc. All rights reserved. The formula behind the volume of a hollow cylinder is: cylinder_volume = π * (R² - r²) * cylinder_height. The volume of the cylinder is the product of its length or height (h) and the area of its cross-section, which you determine by measuring radius (r). She has an MA in Education, specializing in Administration and Supervision from Saint Louis University. Thanks to all authors for creating a page that has been read 3,249,430 times. If you know the circumference, then you can divide it by 2π to get the radius. Is this right? Since π is normally rounded to 3.14, you can say that the area of the circular base is 3.14 in. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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