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Bunuel
A matting that extends three inches beyond the border is glued to the back of a photograph with dimensions 10 inches by 8 inches. What is the area of the matting (in square inches)?

A. 63
B. 143
C. 144
D. 182
E. 224


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Matt is generally a window that surrounds the photo so I would assume that it starts from the edge of the photo and extends 3 inches beyond on each side. It is like a border around the photo. But this clarification is not provided in the question.
Since the photo's dimensions are 10 by 8, the matting's outer dimensions will be 16 by 14 (3 inches extra on either side).
So area of the matting will be 16*14 - 10*8 = 224 - 80 = 144

Answer (C)
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Bunuel and KarishmaB : How to know that the Matting is extending on all the sides and not on only one side
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Bunuel and KarishmaB : How to know that the Matting is extending on all the sides and not on only one side

Had it been on only one side, the question would have told us that. Though as I said in my solution above, the question does not clarify and assumes that test taker knows what matting around a photo is. This is not correct and won't happen in GMAT. For example, what is called "mat" in US is called "mount" in India, and that too one would know if one were into Arts. GMAT clarifies exactly what it is talking about.
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