How do you calculate the end time if the start time is 9:30 AM and the duration is 2 hours?

The end time is 11:30 AM.

To calculate the end time when you know the start time and the duration, you simply add the duration to the start time. In this case, the start time is 9:30 AM and the duration is 2 hours.

First, let's break it down step by step. Start with the given time, 9:30 AM. Adding 1 hour to 9:30 AM brings you to 10:30 AM. Then, adding another hour to 10:30 AM brings you to 11:30 AM. Therefore, 2 hours after 9:30 AM is 11:30 AM.

When adding time, it's important to keep track of the hours and minutes separately. Here, since the minutes part of the start time is 30, and the duration is in whole hours, the minutes part remains unchanged. You only need to add the hours part of the duration to the hours part of the start time.

This method works for any start time and duration. If the duration had included minutes, you would add those minutes to the start time's minutes, and if the total minutes exceeded 60, you would convert the excess into hours. For example, if the duration was 2 hours and 45 minutes, you would add 45 minutes to 9:30 AM, resulting in 10:15 AM, and then add the 2 hours to get 12:15 PM.