Question

a boat can sail at 27 m.s in still water. the boat must cross a river that flows at 9 m.s towards the east . if the boat crosses the river by going up stream at an angle of 23 south, what will the size and angle of the resulting velocity be?
Are you trying to go straight across the river by aiming upstream? What is meant by an angle of 23 south? South of what?
23 degrees south

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