Лаг1989 задача №1.8

Two boats left the point A simultaneously, developing the same speed V. With respect to the water, one crossed the river from point A to point B and vice versa strictly perpendicular to the shores, and the second made the way from point A to point C and back along the shore. Distances | AB | = | AC | = L speed of the current of the river U. What time did each of the boats spend on its way?

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