math

Find the surface area of the cone. Use 3.14 for pi. The radius is 8in and the height is 7in.
need help

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  1. the answer is ~ 468

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  2. area of sides = pi r L
    area of bottom = pi r^2

    if the height is 7 and the radius is 8 then the slant height, the hypotenuse
    L = sqrt ( 49 +64) = sqrt ( 113 ) = 10.63
    the area of the sides is then pi * 8 * 10.63 = 267.2
    the area of the bottom is pi *64 = 201.1
    the sum = 468.3

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    posted by Damon

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