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Math

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How much paper is used for a label on a can of frosting. The height of the jar is 5 inches and the radius is 1.5 inches

I did SA=2TTrh+2TTr^2
SA=2TT1.5(5)+2TT1.5^2
SA=15TT + 2TT2.25
SA=15TT=4.5TT SA=19.5TT
SA=61.261
SA=61.3in^2
61.3in squared of paper was used for the label
Did I do these steps correctly? Thanks for your help!

  • Math -

    If only the sides, but not the top and bottom are covered with paper >>

    A = 2 * pi * r * h

    A = 2 * 3.14 * 1.5 * 5

    A = 47.1

    If the ends are also covered >>

    A = 2 * pi * r^2

    A = 2 * 3.14 * 1.5^2

    A = 14.13

    14.13 + 47.1 = 61.23 square inches

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