To solve for the average velocity, apply the formula:

`v_(ave) = (Delta x)/ (Delta t)`

where

`v_(ave)` is the average velocity

`Delta x` is the displacement

`Delta t` is the time elapsed

In the problem, the body goes from A to B and then from B to A. Since the body returns to its original position, its displacement is zero.

Plugging in `Delta x = 0` to the formula yields,

`v_(ave) = 0/ (Delta t) =0`

**Therefore, the average velocity of the body is 0 m/s.**

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