# Math

How do you calculate the surface area of a cylinder when the diameter is 15cm and the height it 10cm

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1. http://www.math.com/tables/geometry/surfareas.htm

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2. I went on that website but I don't understand it

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posted by Annie
3. Surface Area of a Cylinder = 2 pi r 2 + 2 pi r h

SA = 2(3.14 * 7.5^2) + 2(3.14 * 7.5 * 10)

SA = 353.25 + 471.0

SA = _______ square cm

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4. will it be 824.25

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posted by Annie
5. Yes.

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