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Question
A train travels from A to station B with a velocity of 100 km/h and returns from station B to station A with a velocity of 80 km/h. Its average velocity during the whole journey is ______ and its average speed is ______.
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Solution
A train travels from A to station B with a velocity of 100 km/h and returns from station B to station A with a velocity of 80 km/h. Its average velocity during the whole journey is zero and its average speed is 90 km/h.
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Velocity
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