4:00 The clock shows 3:45, which is 15 minutes slow. The actual time, according to the information given, is a quarter past the hour. In a 12-hour clock, "a quarter past" means 15 minutes past the hour. Therefore, if 3:45 is 15 minutes slow, adding 15 minutes to 3:45 brings us to 4:00. The correct time is 4:00.