A man wants to swim in a river from
A to
B and back from
B to
A always following line
AB. The distance between points
A and
B is S. The velocity of the river current v is constant over the entire width of the river.
A The line
AB makes an angle
α with the direction of current. With what velocity u and at what angle
β to the line
AB should the man swim to cover distance
AB and back in time
t?
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