Explanations:To understand the concept of calculating arrival time based on departure time and travel duration, we need to consider the basic principles of time addition. The problem states that the journey from Bangalore to Goa takes 7 hours, and the departure time is 11:00 AM. The goal is to determine the arrival time.
The process involves adding the travel duration to the departure time. Here, we start with 11:00 AM and add 7 hours. Let's break this down step-by-step:
1. Start at 11:00 AM.
2. Add 1 hour: 12:00 PM.
3. Add another hour: 1:00 PM.
4. Add another hour: 2:00 PM.
5. Add another hour: 3:00 PM.
6. Add another hour: 4:00 PM.
7. Add another hour: 5:00 PM.
8. Add the final hour: 6:00 PM.
Thus, after adding 7 hours to 11:00 AM, the arrival time is 6:00 PM. This method ensures that we correctly account for the transition from AM to PM, which occurs at 12:00 PM (noon).
It is important to note that the confusion often arises when students do not correctly handle the transition from AM to PM. For instance, if a student mistakenly adds 7 hours to 11:00 AM and arrives at 5:00 PM, they have subtracted an hour instead of adding. Similarly, if a student arrives at 7:00 PM, they have added an extra hour. Lastly, if a student arrives at 6:00 AM, they have confused AM and PM.
Therefore, the correct arrival time is 6:00 PM, as it accurately reflects the addition of 7 hours to the departure time of 11:00 AM.