A man of `50 kg` is standing at one end on a boat of length `25m` and mass `200kg`.If he starts running and when he reaches the other end, has a velocity `2ms^(-1)` with respect to the boat.The final velocity of the boat is

A 50kg man is standing at one end of 3,25m long boat. He starts running towards the other end. On reaching the other end his velocity is 2ms^(-1) . If the mass of the boat is 200 kg, final velocity of the boat is ( in ms^(-1) )