Official Guide Explanation:
Data Sufficiency #114

Background

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Solution and Metadata

Question: 114
Page: 283
Difficulty: 5 (Moderate)
Category 1: Geometry > Circles > other
Category 2: Arithmetic > Ratio and Proportion >
Category 3: Word Problems > Geometry Problems >

Explanation: Put in more mathematical terms, the circumference of K is (1/2) the circumference of G. To find the area of G, you'll need the radius of G, which you can get from the circumference of G. Since G and K are related, any bit of information--radius, diameter, circumference, area--about either garden will be sufficient.

Statement (1) offers the area of G, from which you can get the radius of G , then the circumference of G, then the circumference of K, so it is sufficient. Statement (2) is also sufficient, as it gives the circumference of G, from which you can get the circumference of K. The correct choice is (D).

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