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  • 13-11-2022
  • Mathematics
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an electric skateboarder is travelling west on a path along the river at 5m/s. A brisk walker on the other side of the riverbank is walking east along a path at 2m/s. The two paths are 30m apart. The skateboarder is initially 500m east of the walker. After 60 seconds, how fast is the distance between the skateboarder and the walker changing?

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