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Really hard geometry question?

If the lateral surface area of a cylinder is 128 times pi cm squared and the height is 16 cm, what would the radius be?

1 Answer

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  • M
    Lv 6
    10 years ago

    the area of lateral surface of a cylinder is 2 π r * h.

    2 π r * 16 = 128 π

    so, it will be

    32 π r = 128 π

    r = 4 cm

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