An 8-Mg truck is resting on the deck of a barge which displaces 240 Mg and is at rest in...

An 8-Mg truck is resting on the deck of a barge which displaces 240 Mg and is at rest in still water. If the truck starts and drives toward the bow at a speed relative to the barge v_rel = 6 km/h, calculate the speed v of the barge. The resistance to the motion of the barge through the water is negligible at low speeds.