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how to calculate surface area of a donut shape, that is 1 inch wide, has a outer radius of 2.5 and a inner radius of 1.5
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how to calculate surface area of a donut shape, that is 1 inch wide, has a outer radius of 2.5 and a inner radius of 1.5

User Shibapoo
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1 Answer

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speed is 250 or 4.5=55.55555
User Varun Vishnoi
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