Starting from P at the end of third turn motorist reaches S the displacement is PS which is PO+0S
As this shape is regular hexagon therefore the triangles formesd are equilateral triangle
and hence PO=PQ=QO=500m. Therefore displacement is PO+OS=1000m.
Whereas, Distance =PQ+QR+RS=500+500+500=1500m
At the end of the sixth turn the motorist reaches the same point P. therefore Displacement=0 and
At the end of the eighth turn the motorist reaches the point R so total displacement would be PR