Question

Radius of big circle is 10cm and smaller circle is 4 cm.Find the area shaded in between two circles

Answer 1

let radius of big circle be 'R' and radius of small circle be 'r'

area of shaded region=R^2 - r^2

                                     = (10x10)-(4x4)

                                      = 100 - 16  

                                       = 84 cm