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.

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.