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A man moves up on a 3 km long incline ro...

A man moves up on a 3 km long incline road with speed of 2m/s , then on a 3 km level road with speed of 3 m/s and moves down on a 3 km long incline road with 6 m/s. Find the average speed of man.

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The correct Answer is:
3 m/s
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