A train leaves Delhi on 29th August, 2019 at 16:30 hours and reaches its destination on 31st August at 08:45 hours. The total travel time of the journey is

From 29 August 16:30 to 30 August 16:30 = 24 hours. From 30 August 16:30 to 31 August 16:30 = 24 more hours (total 48 hours). But we need to go to 31 August 08:45. From 31 August 08:45 backward to 30 August 16:30: 08:45 next day means subtract from 24+8:45 = 32:45 minus 16:30 = 16 hours 15 minutes. So total = 24 + 16:15 = 40 hours 15 minutes.