The velocities of three particles of masses 20g, 30g and 50g are `10hati,10hatj " and " 10hatk` respectively. The velocity of the centre of mass of the three particles is

The velocities of three particles of masses 20 g, 30 g and 50 g are 10hat i, 10hatj and 10hatk respectively. The velocity of the centre of mass of the three particles is

The velocities of three particles of masses 20 g, 30 g and 50 g are 10hat i, 10hatj and 10hatk respectively. The velocity of the centre of mass of the three particles is

Two objects of masses 200g and 500g have velocities of 10i m//s and (3i + 5j) m//s respectively. The velocity of their centre of mass is

Two objects of masses 200 g and 500 g possess velocities 10hati ms^(-1) and 3hati+5hatj ms^(-1) respectively. The velocity of their centre of mass in ms^(-1) is

Three particles with masses 10, 20 and 40gm are moving with velocities 10hati, 10hatj and 10hatk m/sec respectively. If due to some interaction the first particle comes to rest and the velocity of second becomes ) (3hati+4hatj) m/sec. then the velocity of third particle after the interaction is-