A person standing at the end of a room in front of a window 1.1 m high notices that a shoelace climbs in a vertical direction near the outer surface of the window and is out of sight at the upper border of the window; then he returns and At the lower border of the window, it is out of sight. If the total time when the toe of the shoe is exposed is 0.74 seconds, how high is the toe of the shoe higher than the upper edge of the window?
