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    atrnca's Avatar
    atrnca Posts: 1, Reputation: 1
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    #1

    Jul 16, 2008, 10:47 AM
    Volume and surface area
    A cylindrical can is to have the area of its curved surface equal to thesum of the areas of its base and its top. What must be the relation between the height and diameter of this can?
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #2

    Jul 16, 2008, 11:48 AM
    The area of the curved surface of the can is

    The area of the two bases is

    They must be equal:



    Now, find the relationship between r and h.
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