Question: Two boats, A and B, move away from a buoy anchored at the middle of a river along the mutually perpendicular straight lines: the boat

Two boats, A and B, move away from a buoy anchored at the middle of a river along the mutually perpendicular straight lines: the boat A along the river, and the boat B across the river. Having moved off an equal distance from the buoy the boats returned. Find the ratio of times of motion of boats if the τA /τB velocity of each boat with respect to water is η = 1.2 times greater than the stream velocity.

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