04:15 Here's the reasoning behind this: 1. The clock shows 3:45, but it's 15 minutes slow. So, the actual time is 3:45 + 15 minutes = 04:00. 2. Now, the text states that the actual time is a quarter past an hour. Since we already adjusted the time to 04:00, adding another 15 minutes (which is a quarter of an hour) gives us 04:15 as the correct time.