1. The problem involves understanding the bus timetable and calculating the time intervals between stops or the total travel time. 2. The timetable shows bus departure times from various stations at four different runs: 11:15, 11:45, 12:15, and 12:45 from the Bus Station. 3. To find the travel time between two stops, subtract the departure time at the earlier stop from the departure time at the later stop. 4. For example, to find the travel time from Bus Station to Lower Bridge for the 11:15 run: $$\text{Time at Lower Bridge} - \text{Time at Bus Station} = 11:21 - 11:15 = 6 \text{ minutes}$$ 5. Similarly, to find the total travel time from Bus Station to Science Centre for the 11:15 run: $$12:05 - 11:15 = 50 \text{ minutes}$$ 6. This method applies to all runs and stations. 7. The timetable shows that buses run every 30 minutes from the Bus Station, and the travel times between stops are consistent across runs. 8. Understanding this timetable helps plan when to catch the bus and estimate arrival times at different stops.