Question

when does displacement and distance be the same?
what will be the displacement if a body covers a path in a circle?

Answer 1

If a body keeps moving in the same direction then displacement and distance will be the same.
If a body travels in a circle the displacement will be 0 when it completes one round

Answer 2

Displacement and distance are same when the body travels in a straight line without returning back. Displacement is zero when the body moves in a circle as the body returns to its initial position.