A boat is moving with speed 3i + 4j with respect to ground . The water in the river is moving with the velocity -3i - 4j with respect to ground . What is the relative velocity of the boat with respect to ground .
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Velocity of boat w.r.t. ground = 3i + 4j Velocity of water w.r.t. ground = -3i - 4j Velocity of boat w.r.t. water = 3i + 4j - (-3i - 4j) =3i + 4j + 3i + 4j = 6i + 8j
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