(Answered) An antelope runs 350m at a constant speed of 220 ms then

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An antelope runs 350m at a constant speed of 2.20 m/s, then immediately changes speed to 3.50 m/s and runs for a distance of 400m. What is the average speed of the antelope for the entire period of motion? Assume the motion of the antelope is 1-dimensional. Answer should be in m/s.

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