A river current has a velocity of 10 km/h relative to the shore, and a boat moves in the same direction as the current at 10 km/h relative to the river. how can the velocity of the boat relative to the shore be calculated? A. By subtracting the river current vector from the boats velocity vector. B. By multiplying vectors. C. By dividing the river current vector by the boats velocity vector. D. By adding the vectors?
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