Radius of inner circle = 7 cm
Radius of outer circle = 14 cm
Angle made by sector = 40∘ Area of the sector making angle
θ =(θ360∘)×πr2 Area of the sector
OAC=(40∘360∘)×πr2 cm2 =19×227×142=68.44 cm2 ![](https://search-static.byjusweb.com/question-images/byjus/_e50abab0ad6466318e5102f3839e8a1f06a03e1f20160914-6429-11qdmjk.png)
Area of the sector
OBD =(40∘360∘)×πr2cm2=19×227×72=17.11 cm2 Area of the shaded region ABDC
= Area of the sector OAC - Area of the sector circle OBD
=68.44 cm2−17.11 cm2=51.33 cm2