At the centre of a circular ice rink, a 85.0 kg ice skater moving 1.80 m/s north hits and grabs onto a 54.0 kg ice skater who had been traveling west at 6.05 m/s. If the skaters hold onto each other and the rink has a 27.0 m diameter, what is the amount of time for the skaters to reach the edge of the rink?