How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?
Rahul decided to meet Simran so he boards a local train from Bombay station. Just after the station, there is a 1km long tunnel. The train starts and is now accelerating. Rahul is a claustrophobic guy, so what is the best position for him to sit?