A man walks towards the north a distance of 10 km at rate of 5 km per hour and then walks towards the west a distance of 12 km in 3hours. What is the average velocity of the man?

A man walks towards the north a distance of 10 km at rate of 5 km per hour and then walks towards the west a distance of 12 km in 3hours. What is the average velocity of the man? Correct Answer 2615 km per hour

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