Three identicle particle each of mass `1 kg` are placed with their centres on a straight line. Their centres are marked `A, B and C` respectively. The distance of centre of mass of the system from `A` is.

Three identicle particle each of mass 1 kg are placed with their centres on a straight line. Their centres are marked P, Q and R respectively. The distance of centre of mass of the system from P is.

Three identical particles each of same mass are placed touching each other with their centres on a straight line. Their centres are at A, B and C respectively. Then distance of centre of mass of the system from A is

Three identical particles each of same mass are placed touching each other with their centres on a straight line.Their centres are at A,B,and C respectively.Then distance of centre of mass of the system from A is

Four identical bodies each of mass 1 kg are placed touching to each other with centres on a straight line. If their centres are marked A, B, C and D respectively, then the distance of centre of mass of the system from B will be

Three identical spheres, each of mass 1 kg are kept as shown in figure, touching each other, with their centres on a straight line. If their centres are marked P, Q, R respectively, the distance of centre of mass of the system from P (origin) is