A calf is tied with a rope of length 6m at the corner of the square grassy lawn of side 20m if the length of the rope is increased by 5.5 m find the increase in area of the grassy lawn in witch the calf can graze. Find the area of a sector of a circle of radius 21 cm and central angle 120 degree. November 25, 2020 Category: Chapter 12 - Areas Related to Circles , Maths , NCERT Class 10 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related