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A man of mass m = 60 kg is standing in a boat of mass M = 240 kg. A boat is moving uniformly at a speed of 2 m/s. A person jumps from a boat in a horizontal direction at a speed of 4 m/s relative to the boat. Find the speed of the boat after the person has jumped from it. The person jumps forward in the direction of the original movement of the boat.

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