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Formula
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Area = πr²
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Find Radius
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Diameter = 2 ft
Radius = Diameter ÷ 2
Radius = 2 ÷ 2
Radius = 1 ft
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Area of the manhole
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Area = πr²
Area = (3.14)(1)²
Area = 3.14 ft²
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Answer: 3.14 ft²
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