Raman starts walking towards West. After walking 10 metres he turns towards North. After walking 20 metres he turns towards East and walk 10 meters. How far is he from him original position and in which direction?
The path can be traced like:
After moving to 10 m to west, he moves 20 m north, and then again 10 m east. The movement in west and then east will cancel each other, further making the movement to north the only effective one. Hence, he is 20 m north from the initial starting point.