Question

Find the curved surface area of a sphere of radius 1cm. (π = 3.14)

Answer 1

Curved surface area of sphere = 4πr²
                                            = 4 × 3.14 × 12 (`because`r = 1 cm)
                                            = 4 × 3.14 × 1
                                            = 4 × 3.14
                                            = 12.56 sq. cm