the figure attached

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the figure attached

by sanju09 » Fri Dec 11, 2009 11:11 pm
In the figure attached, two rectangles with the same dimensions overlap to form the shaded region. If each rectangle has perimeter 12 and the shaded region has perimeter 3, what is the total length of the heavy line segments?

(A) 15
(B) 18
(C) 21
(D) 22
(E) None of these
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by thephoenix » Sat Dec 12, 2009 8:00 am
IMO C
12+12-3=21