Posted by alysha on Sunday, January 31, 2010 at 8:02pm.
Draw a picture of it. How many boards does the worker need?
It depends upon the width of the boards used. Let's assume they are as wide as the pen height needs to be (which is unlikely).
To divide the rectangle into a 4 x 3 array or 12 equal areas, five boards are needed. They will have to be notched where they intersect.
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