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A train at a constant 60.0 km/h moves ea...

A train at a constant 60.0 km/h moves east for 40.0 min, then in a direction `50.0^(@)` east of due north for 20.0 min, and then west for 50.0 min. What are the (a) magnitude and (b) angle of its average velocity during this trip?

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(a) 7.59 km/h, (b) `67.5^(@)` (north of east), or `22.5^(@)` east of due north
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