#### Answer

1.74 m/s

#### Work Step by Step

Velocity = Displacement/Time. Therefore, in order to find the average velocity over a time period, we need to find the total displacement and the total time and divide the two. For this case, we have 2 segments:
1) you walk 73.2m at a speed of 1.22 m/s
2) you run 73.2m at a speed of 3.05 m/s
The distance covered in segment 1 is 73.2m (given) and the time it takes can be found by taking the 73.2m and dividing it by 1.22m/s, which gives 60 seconds.
The distance covered in segment 2 is 73.2m (given) and the time it takes can be found by taking the 73.2m and dividing it by 3.05 m/s, which gives 24 seconds.
The total distance is 73.2 + 73.2 = 146.4m and the total time is 60 + 24 = 84 seconds.
The average velocity is displacement/time or 146.4m/84seconds = 1.74 m/s