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Source: — Data Sufficiency |
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by Jim@StratusPrep » Wed Nov 28, 2012 3:54 pm
You just need one side.

1) There are many different Rhombuses that have areas of 390.
2) Same as above, you would need both diagonals

Putting them together you have 2 isosceles triangles created by the diagonal. Each triangle has a base of 26 and area of 195. You can then calculate the height, or half of the other diagonal. This would get you your answer.

C.
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by Jim@StratusPrep » Wed Nov 28, 2012 3:55 pm
BTW, this does not strike me as a GMAT problem only because the calculation would actually be messy, usually you will get clean numbers.
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