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What is the area of the top surface of a circular manhole cover that has a radius of 30 centimeters? Use 3.14 for π.

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Given:
radius = 30 cm
π = 3.14

Find: Area of the top surface of a circular manhole cover.

Area of a circle = π r²

Area of a circle = 3.14 * (30cm)²
                        = 3.14 * 900 cm²
Area of a circle = 2,826 cm²

The area of the top surface of a circular manhole cover is 2,826 cm²
Area for a circle is π r² (pi equals r squared)
 3.14 * 30cm²
 3.14 * 900 cm²
 2,826 cm²

Answer: 2,826 cm squared. 

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