A plane travels 350 km south along a straight path with an average velocity of 125 km/h to the south. The plane has a 30 minute layover, and then travels 220 km south with an average velocity of 115 km/h to the south. What is the average velocity for the trip?. a. 120 km/hr to the south. b. 110 km/hr to the south. c. 121 km/hr to the south. d. need more information
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