A circular pond with a radius of 9 m is surrounded by a walking path that is 4.5 m wide. Determine the ratio of the area of the walking path to the area of the pond.

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1. Outer radius: $R=9+4.5=13.5$. 
2. Areas: pond $=\pi	imes9^2=81\pi$, large circle $=\pi	imes13.5^2=182.25\pi$. 
3. Path area $=182.25\pi-81\pi=101.25\pi$. 
4. Ratio $=101.25:81 = 405:324 = 5:4$.

FINAL_ANSWER: b

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