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A person travels along a straight road for half the distance with velocity 1 v and the remaining half distance with velocity 2 v The average velocity is given by

1. 1 2 v v
2. 2 2 2 1 v v
3. 1 2 v v 2 
4. 1 2 1 2 2v v v v 

Correct answer: 1 2 1 2 2v v v v 

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