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A circular park has a radius of 10 m and is surrounded by a path 2 m wide running all around it. What is the area of the path?

1. 131.1 m^2
2. 138.2 m^2
3. 144.5 m^2
4. 150.7 m^2

Correct answer: 138.2 m^2

Solution

The outer circle has radius 12 m and the inner 10 m. Area of the path = pi(12^2 - 10^2) = pi(44) is about 138.2 m^2.

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