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An aluminum cylindrical juice can has a height of 4 in. and a radius of 6 in. How many square
inches of aluminum are needed to make the can?

  • math -

    Visualize a can, cut off the circles at the top and bottom, and cut open the remaining "sleeve".

    Don't you now have 1 rectangle and 2 equal circles?
    Find the areas of each and add them up

    (hint: the length of the rectangle is the circumference of the circle)

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