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What is the lateral area of a cone with a radius of 3.5 milliliters and a slant height of 8 millimeters?

    ##28 pi## or approximately 87.9646

    By definition, the lateral area of a cone is… ##A_l = L * pi * r## where ##L## is the slant height and ##r## is the radius.

    So,

    ##A_l = L * pi * r = 8 * pi * 3.5 = 28 *pi##

    Which is approximately 87.9646

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