Q10. Consider two points A & B, we want to find the fastest path between these two and they both lay in the same region.
When both points are in the same region, it seems like straight line must be the fastest. But you have another option of going to faster region and come back (Path 3).
i) Fix the position of point A and keep point B moving. Make the straight path between these two and calculate time taken.
ii) Make another path of going to medium 2 (faster region) and come back. Calculate the time taken.