[" 4.Particles of masses "1kg" and "3kg" are at "],[(2i+5j+13k)m" and "(-6i+4j-2k)m" the "],[" instantaneous position of their centre of mas "],[" is "]

Particles of masses 1kg and 3kg are at 2i + 5j + 13k)m and (-6i + 4j - 2k)m then instantaneous position of their centre of mass is

Particles of masses 1 kg and 3 kg at (2i+5j+13 k) m and (-6i+4j-2k)m then instantaneous position of their centre of mass is

Particles of masses 1 kg and 3 kg at (2i+5j+13 k) m and (-6i+4j-2k)m then instantaneous position of their centre of mass is

Particles of masses 1kg and 2kg are at (i+2j+3k) m and (-2i+4j+2k)m then instantaneous position of their centre of mass is

Particles of masses 1kg and 3kg are moving with the velocities (10i-7j-3k)ms^(-1) and (7i-9j+6k)ms^(-1) then the instantaneous velocity of their centre of mass is