Answer :
Average speed = (total distance) / (time to cover the distance)
Total distance = (15 x 10m) = 150 m
Time to cover the distance = 60 s
Average speed = (150m) / (60s) = (150/60) m/s = 2.5 m/s
We have no way to describe the frog's velocity, because we have
no information about the direction of any this activity.