A postman was returning to the post office which was directly in front of him to the north. When the post office was 50 m away from him, he turned left and walked 20 m. Then he moved in the same direction for another 15 m. Next, he turned right and walked 50 m. How far is he now from the post office?

Deepa moved a distance of 75 m towards the North. She then turned to the left and walked for about 25 m, turned left again and walked 80 m. Finally, she turned to the right. In which direction was she moving finally?

At 6:00 PM in the evening, while sitting and reading in a library, light was entering through a window on the wall to my left. If the main entrance of the library faces East, in which direction was I facing while reading?