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A cone is created by rotating a right triangle with leg length 3 and leg length 4 about the leg of length 4. Its surface area is pi times what number?

 Oct 18, 2020
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A = pi r ( r + sqrt(r^2 + h^2) )       r = 3    h = 4

    sub those in to get    A = 24 pi

 Oct 18, 2020

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