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 `tau_A//tau_B` if the velocity of each boat with respect to water is `eta=1.2` times greater than the stream velocity.

Answer

[1.8]