A Boeing 747 "Jumbo Jet" has a length of 59.7 m. The runway on which the plane lands intersects another runway. The width of the intersection is 29.9 m. The plane decelerates through the intersection at a rate of 6.40 m/s2 and clears it with a final speed of 41.2 m/s. How much time is needed for the plane to clear the intersection?