Algebra

Find the radius of a right cone with slant height 21 m and surface area 168pi m2

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  1. Does that surface area include the base?

    The area of the conical portion is
    A = pi* R * (slant height)

    You can use that formula to solve for the radius, R

    See http://www.uwm.edu/~ericskey/TANOTES/Geometry/node15.html

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    posted by drwls

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