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Thread: Cost of a Can

  1. #1
    MHF Contributor
    Jul 2008

    Cost of a Can

    A can in the shape of a right circular cylinder is needed to have a volume of 500 cubic centimeters. The top and bottom are made of material that costs 6 cents per square centimeter, while the sides are made of material that costs 4 cents per square centimeter. Express the total cost C of the material as a function of the radius r of the cylinder
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  2. #2
    Newbie jenatla's Avatar
    Nov 2008
    it will take me a while to figure out how to type the letter "pi" here, but just give you a hint, you calculate the area of the top of the can, and double it, then times 6; then calculate the perimeter of the top, times the height of the can, and times 4; add the two results, and you will get the answer.

    btw, in order to figure out the height, you need to use the volume divide by the top area.
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