Answer:
We can use the formula for average velocity, which is:
average velocity = total displacement / total time
The total displacement is the net distance and direction of the horse's motion. If we take "towards right" as the positive direction, then the horse's displacement is:
total displacement = 60 m towards right - 30 m towards left = 30 m towards right
The total time is the sum of the two time intervals:
total time = 3 s + 2 s = 5 s
Now we can plug in the values and calculate:
average velocity = total displacement / total time
average velocity = 30 m / 5 s
average velocity = 6 m/s
Therefore, the answer is A. 6 m/s.