### Problem 1.8

#### Task:

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.