The diagram above shows a rectangular garden, bordered by a walkway consisting of white and gray rectangles. If all...

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The diagram above shows a rectangular garden, bordered by a walkway consisting of white and gray rectangles. If all four of the gray rectangles have the same dimensions, and the garden measures 20 by 10 feet, what is the area of the walkway?

(1) Each gray rectangle has an area of 12 square feet.
(2) The outer perimeter of the walkway is 88 feet.

Answer: E

Source: Manhattan GMAT
Source: — Data Sufficiency |