The Official Guide For GMAT® Quantitative Review, 2ND Edition
The perimeter of a rectangular garden is 360 feet. What is the length of the garden?
(1) The length of the garden is twice the width.
(2) The difference between the length and width of the garden is 60 feet.
If Length = L and Breadth = B
Then 2(L + B) = 360
=> L+B = 180
Statement 1) L = 2B
Substituting in the above equation, 3B = 180. I can determine B and subsequently A. Hence Sufficient.
Statement 2) L-B = 60
Solving with the premise equation, we can determine the length. Hence Sufficient.
Hence Option D)
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