Answer: this is the answer
Explanation:
Solution
Circumference of rectangle = 2(50 meters) + 2(20 meters) = 100 meters + 40 meters = 140 meters.
Travels around rectangle 2 times = 2(140 meters) = 280 meters.
Distance = 280 meter.
Displacement = 0 meter. (runner back to start point)
Average speed = distance / time elapsed = 280 meters / 100 seconds = 2.8 meters/second.
Average velocity = displacement / time elapsed = 0 / 100 seconds = 0.
