A runner training for a race times 400 meter laps. Lap 1 60sec, Lap 2 57sec, Lap 3 55sec, Lap 4 53sec. What is the average velocity in meters per second?
a. 0.563
b. 7.1
c. 14.2
d. 56.25
1 answer
average velocity= totaldistance/total time