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I have a surface area? my base is 18m, height is 4m and wisdth is 14m - do not understand the equation given by teacher of: top bottom, both sides and front and back to get answer - this does not make sense to me - please explain

  • math -

    18 times 4 times 14

  • math -

    I will assume you have a rectangular "box"
    area of top and bottom = 2(18)(14
    area of front and back = 2(18)(4)
    area of the two sides = 2(14)(4)

    Add them up


    Your teacher probably gave you
    2(lw) + 2(lh) + 2(wh) , which is what I did above

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