A polar bear starts at his den. It travels 1.0 km south, then 1.0 km east, then 1.0 km north,
then 1.0 km west to return to its starting point. This trip takes 45 min. What was the
bear's average velocity?
O O km/jr
O 0.90 km/hr
O 3.0 km/hr
O 5.3 km/hr