If a train arrives at Grand Central Station at 0203 hrs, what time did it start if it took 2 hours and 20 minutes?

To determine the train's departure time based on its arrival time and travel duration, it's essential to subtract the travel time from the arrival time. The train arrives at Grand Central Station at 0203 hrs and took 2 hours and 20 minutes to make the journey.

First, convert the travel time into a single unit for easier subtraction. The travel time is 2 hours and 20 minutes, which can be broken down as follows:

• 2 hours

• 20 minutes

Now, start from the arrival time, 0203 hrs. When you subtract the travel time from this point, it is helpful first to subtract the full hour (2 hours):

• Subtracting 2 hours from 0203 hrs gives 0003 hrs.

Next, subtract the additional 20 minutes from the 0003 hrs:

• 0003 hrs minus 20 minutes brings you to the previous hour, which is 2353 hrs (or 11:53 PM the previous day).

However, ensuring we account for the entire duration properly, let's reverse it:

• Starting from 0203 hrs, if we add back the 2 hours and 20 minutes (to cross-check), we end back at 0000 hrs (