m/s. The runner's friend is? A runner sprints around a circular track of radius 140 m at a constant speed of 7 m/s. The runner's friend is standing at a distance 280 m from the center of the track. How fast is the distance between the friends changing when the distance between them is 280 m? (Round to 2 decimal places.)
A runner sprints around a circular track of radius 140 m at a constant speed of 7
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