Rishi left for office from his home at 9:30 AM and reached office after 1 hour 15 minutes. His working hours were 9 hours (including a 1-hour lunch break), after which he went shopping. Finally, he reached home 45 minutes after leaving the office. Find the total time he spent outside his home.

If a WLL system's protocol stack consists of 4 layers, and it takes an average of 1.5 milliseconds for each layer to process a packet, how long does it take for the entire stack to process a single packet?

A train starts from Patna on 30th May, 2020 at 23:40 hours and reaches Mumbai on 1st June, 2020 at 05:15 hours. What is the total travel time of the train?