Physics
posted by Kevin .
A bird watcher meanders through the woods, walking 0.35 km due east, 0.65 km due south, and 2.05 km in a direction 31.0° north of west. The time required for this trip is 3.50 h. Determine the magnitude and direction (relative to due west) of the bird watcher's. Find the displacement and km(magnitude) and find the average velocity in km/h

Break up each leg into N and W components. THe first two are given in those components, so you only have to break up the last. Add all vectors, you get a total N and a total W component.
Avg velocity=totaldisplcement/time.