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A man can still swim in water at speed 3km/h. He want to cross a river that flows at 2km/h and reach directly opposite to the starting point

1) find in which direction should he try to swim and find the angle of his body makes river fkowst
2) how much time will be take to cross the river if river is 500 width

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  1. draw a diagram
    If he swims upstream at an angle of θ such that sinθ = 2/3
    then his actual travel will be straight across the river.

    The distance he actually swims is given by the hypotenuse of the triangle.
    time = distance/speed

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