Three identical spheres each of radius .R. are placed touching each other so that their centres A, B and C lie on a straight line. The position of their centre of mass from A is

Three identical spheres each of radius .R. are placed touching each ot

1.	Three identical spheres each of radius .R. are placed touching each other so that their centres A, B and C lie on a straight line. The position of their centre of mass from A is
Answer» `(2R)/(3)` 2R `(5R)/(3)` `(4R)/(3)` Answer :B