Let the Centroid of an Equilateral Triangle ABC Be at the Origin and One of Its Sides Lie Along the Straight Line x + y = 3. If R and r Are the Radii of the Circumcircle and Incircle of Triangle ABC, Then R + r Is Equal To
JEE Main 2021 PYQ: an equilateral triangle has its centroid at the origin and one side along x+y=3. Find R+r using the R=2r relation for equilateral triangles.