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
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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.
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