To determine the amount of time John has until his next appointment, follow these steps:
1. Identify the end time of the first appointment:
- John's first appointment starts at 1200 and lasts for 1 hour.
- Military time is used here, so adding 1 hour to 1200 gives us 1300.
- Therefore, the first appointment ends at 1300.
2. Determine the start time of the next appointment:
- The next appointment starts at 1400.
3. Calculate the time gap between the end of the first appointment and the start of the next appointment:
- Subtract the end time of the first appointment (1300) from the start time of the next appointment (1400):
\(\[
1400 - 1300 = 100
\]\)
4. Convert the time gap into hours:
- In military time, 100 represents 1 hour.
Therefore, the time John has between the end of his first appointment and the start of his next appointment is 1 hour.
The correct answer is:
O B. 1 hour
