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 A. `(AB+BC+BC+CD)/(4)`B. `(AB+BC+BD)/(4)`C. `AB+(AC)/(4)+AD`D. `(AB+BC+CD)/(4)`

Four identical bodies each of mass 1 kg are placed touching to each ot

1.	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 A. `(AB+BC+BC+CD)/(4)`B. `(AB+BC+BD)/(4)`C. `AB+(AC)/(4)+AD`D. `(AB+BC+CD)/(4)`
Answer» Correct Answer - B `R_(g)=(m_(1)x_(1)+m_(2)x_(2)+m_(3)x_(3)+m_(4)x_(4))/(m_(1)+m_(2)+m_(3)+m_(4))` `m_(1)=m_(2)=m_(3)=m_(4)=m` `R=((x_(1)+x_(2)+x_(3)+x_(4)))/(4)` `= (AB+BC+BD)/(4)`

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