NetPoll | Morty commutes via train to his way home from work. The train reaches the station at 6 pm every day. As soon as Morty arrives at the station, his wife Jessica too arrives at the station from home by car to pick him up. Both drive back home. One day Morty left early from work and arrived at the station at 5 pm and instead of waiting, he thought of taking a walk back to home. He started walking. After covering a specific distance, he met Jessica. Both drove back home. After reaching home they realized that they came home 30 minutes earlier than the usual time. How long has Morty been walking? It is known that everyday Jessica starts from home at same time and drives at a uniform speed.