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geometry

the lateral surface area of a cone is 558pi cm^2. The radius is 18cm. Find the slant height to the nearest tenth.
17.1
16.4
31.0
11.6

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  1. you know lateral area of cone = π r l, where both SA and r are known, l is the slant height
    π(18)l = 558π
    l = 558/18 = ....

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    Reiny
  2. 31!
    Thank You!!!

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