An electric skateboarder is travelling west on a path along the river at 4m/s. A brisk walker on the other side of the riverbank is walking east along a path at 2m/s. The two paths are 50m apart. The skateboarder is initially 300m east of the walker. After 60 seconds, how fast is the distance between the skateboarder and the walker changing? Note: We encourage you to use a scientific calculator for this question. The answer below was rounded to 4 decimal points. 7.6933m/s -2.9861m/s -4.5864m/s C 4.6093m/s 2.1594m/s