题目信息
Note: Figure not drawn to scale.
A rectangular yard (white area) is surrounded by a hedge (shaded region) with a length of 15 meters and a width of 12 meters, as shown in the figure above. The area of the yard is equal to the area of the hedge. If the ratio of the length of the hedge to the width of the hedge is the same as the ratio of the length of the yard to the width of the yard, what is the width, in meters, of the yard?
A:$$6\sqrt{2}$$
B:$$\frac{5}{4}$$
C:$$6\over\sqrt{2}$$
D:$$7·{\sqrt{2}\over{2}}$$
E:$$\frac{6}{2}$$
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A:$$6\sqrt{2}$$
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