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A train at a constant 75.0 km/h moves east for 39 min, then in a direction 50.0 east of due north for 19.0 min, and then west for 69.0 min.

A train at a constant 75.0 km/h moves east for 39 min, then in a direction 50.0° east of due north for 19.0 min, and then west for 69.0 min. What are the (a) magnitude (in km/h) and (b) angle (relative to north, with east of north positive and west of north negative) of its average velocity during this trip?

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