Question 1102143
An open box is formed from a rectangular piece of cardboard that is 3 in. longer than it is wide, by removing squares of side 2 in. from each corner and folding up the sides. If the volume of the carton is then 216 in^3, what were the dimensions of the original piece of cardboard? 
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Original dimensions of the rectangular piece::
width = w inches
length = w+3 inches
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After cutting out the 2 by 2 squares the remaining width and length dimensions are:
new width :: w-4 inches
new length:: w+3-4 = w-1 inches
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Volume = length * width * height
216 = (w-1)*(w-4)*w
216 = (w^2-5w+4)*w
w^3 - 5w^2 + 4w - 216 = 0
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w = 7.93 (original width)
w+3 = 10.93 (original length)
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Cheers,
Stan H.
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