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A swimmer S is in the sea at a distance ...

A swimmer `S` is in the sea at a distance `d` `km` from the closest point `A` on a straight shore The house of the swimmer is at a distance `L `km from `A` on the shore. He can swim at a speed of `ukm`/`hr` and walk at a speed of `vkm`/`hr(v>u)`. At what point on the shore should he land so that he reaches his house in the shortest possible time?

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