Question

A dog runs 120 m away from its master in a straight line in 9.0s, and then runs halfway back in one-third the time. Calculate its average speed

Answer 1

Answer:15m/s

Explanation:

Total distance covered = 120+120×1/2m = 180m

Total time taken = 9+9*1/3s =  12s

Average speed = Total distance covered/ Total time taken = 180m/12s = 15m/s.