What is the elapsed time from 10:15 AM to 1:45 PM?

The elapsed time from 10:15 AM to 1:45 PM is 3 hours and 30 minutes.

To work out the elapsed time between two given times, you can break it down into smaller, more manageable steps. First, let's look at the time from 10:15 AM to 12:00 PM. From 10:15 AM to 11:15 AM is exactly 1 hour. Then, from 11:15 AM to 12:00 PM is 45 minutes. So, from 10:15 AM to 12:00 PM, the total time elapsed is 1 hour and 45 minutes.

Next, we need to calculate the time from 12:00 PM to 1:45 PM. This is a bit simpler because it's just a straight count of hours and minutes. From 12:00 PM to 1:00 PM is 1 hour, and from 1:00 PM to 1:45 PM is 45 minutes. So, the total time from 12:00 PM to 1:45 PM is 1 hour and 45 minutes.

Now, we add the two intervals together. The first interval was 1 hour and 45 minutes, and the second interval was also 1 hour and 45 minutes. Adding these together, we get:

1 hour + 1 hour = 2 hours
45 minutes + 45 minutes = 90 minutes

Since 90 minutes is the same as 1 hour and 30 minutes, we add this to the 2 hours we already have:

2 hours + 1 hour and 30 minutes = 3 hours and 30 minutes

So, the total elapsed time from 10:15 AM to 1:45 PM is 3 hours and 30 minutes.