Question

give an example of a body which covers known distance but its displacement is zero

Answer 1

hi...
the example is...
when a body covers a distance and then returns to its origin then the distance is known but displacement is zero.

Answer 2

The example of a body which comers a known distance but displacement is zero is:
When a body is traveling in an circular path and starts from a point and returns to the same point the there will be some distance but zero displacement.
For example, one man is travelling in an circular path such that the radius of the circular path is 7 meter. When the man is starting from one point and returns to the same point then the distance will be :
$2\pi r = 2 \times \frac{22}{7} \times 7 \\ = 44m$
And the displacement is zero.