Posted by cindy on Wednesday, February 20, 2013 at 9:26pm.
Here is a start. Find volume, then new height.
12^3 = Volume = 12 * (12+4) * h
Original box = 12^2 * 5 = material.
New box = 12(12+4) + 2(12h) + 2(12+4)h = material
a volume is 864 what is the length width and height if length and width are the same and height is half of width and length
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