AP and TS EAMCET Medical 2020 Model Paper 3

A body at rest explodes into 3 pieces A, B, C o f masses in the ratio 1 : 2 : 4. If the pieces A and B fly off with velocity 2ms‌−1 and 1ms‌−1 respectively so that the angle between their directions is 120°, the velocity of the piece C will be