With (1) alone you won't get any answer. That is ok for you because you have pick C.
(2) If the rectangles have all the same dimensions and let W and L be those dimensions you have
KN / MN = L / (L+W)
According to the draw L=2W, so
KN / MN = 2W / 3W = 2/3
Any doubt? Just let me know.
ds question
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Source: Beat The GMAT — Data Sufficiency |













