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2. The water in a river moves with velocity 4ims. A boat starts at the bank and this bank, bank-A, is along the i direction. The boats captain wants to cross the river to the opposite bank, bank-B, which runs parallel to bank-A. The captain sets the engine such that the boat would have a speed of 5ms- in still water. What is the velocity vector of the boat and the angle of the boats travel relative to bank-A for the boat to cross the river in the shortest distance?
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