Geometry

Find the radius of a right cone with slant height of 21 m and surface area of 232pi..

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  1. if the lateral area is 232pi, then

    pi rs = 232pi
    rs = 232
    s^2 = r^2+h^2, so
    s = √(r^2+441)

    r√(r^2+441) = 232
    r = 9.97

    So, let's say r=10. Then

    a = 10√541 = 232.6

    If the total area is 232pi, then use the adjusted formula for that.

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    posted by Steve
  2. What is rs

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