IKMC 2027 - Grades 1-2 - Self-study SET 23 - Thematic Batch 3 Question 11

Nam has an electric alarm clock. Whenever power returns after an outage, the clock resets to 00:00. Today the power goes out at 08:00. At 15:00, when Nam does his homework, the clock shows 03:00. How long was the power out?