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The box shown does not have a top. What is the surface area of the box if its length measures 12 cm, its width is 9 cm, and it has a height of 15 cm?

  • math -

    A=w*h
    so, ends first:9*15=135cm^2
    sides:12*15=180cm^2
    bottom:9*12=108cm^2
    135+180+108=423cm^2

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