A relay race is run along a straight-line track of length 300.0 m running south to north. The first runner starts at the south end of the track and passes the baton to a teammate at the north end of the track. The second runner races back to the start line and passes the baton to a third runner who races 300.0 m northward to the finish line. The magnitudes of the average velocities of the first, second, and third runners during their parts of the race are 7.06 m/s, 7.00 m/s, and 7.51 m/s, respectively. What is the average velocity of the baton for the entire race? [Hint: You will need to find the time spent by each runner in completing her portion of the race.]
Vavg= delta r/delta t
delta r= rf-ri
The Attempt at a Solution
After these I get confused which one is the final and initial displacement because there are three of them. Any help please?