physics
posted by connor .
a plane flys 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 of the trip

avg velocity=displacement/time
displacement=350S+220S
time=350/125+.5+220/115
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