How to Calculate the Area of a Tube
Calculating the area of a tube is an unavoidable part of basic math. Whether you are the student or the assisting parent, completing geometry homework doesn't have to be stressful. Calculating the area of a tube is just the matter of visualizing the basic components that make up the tube and knowing and implementing a basic formula. Follow this guideline and formula to help assist you in finding the area of a tube.
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Instructions
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How to Calculate the Area of a Tube
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1
Visualize the shapes that make up a tube: two circles (top and bottom) and a rectangle the exact length to wrap around the circles and the last measurement being the height (of any size).
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2
Calculate the area of the two circles by using this formula:
Area = 2 times pi times the radius squared (2∏r2). Note: The standard equivalent for pi is 3.14, "times" means to multiply, and "squared" means taking the number of the radius times (multiplied by) itself. You are multiplying by 2 since there are two circles. -
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3
Calculate the area of the rectangle of the tube by using this formula: 2 times pi times r times h (or 2∏rh). Use 3.14 for pi, r = radius, and h = height.
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4
Combine (add) the two totals together (area of the circles plus the area of the rectangle). The overall formula you are using is the following: 2∏r2 + 2∏rh
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5
Record your total area.
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1
Tips & Warnings
Having a cylindrical object on hand, such as a Pringle's can, may help the student visualize the various parts that make up a tube.
