Final answer:
The number of trains per hour on a track with a 5-minute headway is 12.
Step-by-step explanation:
To calculate the number of trains per hour on a track based on a headway of 5 minutes, we need to divide the number of minutes in an hour by the headway in minutes. There are 60 minutes in an hour, so we use the following calculation:
Number of trains per hour = 60 minutes per hour / 5 minutes per headway
This gives us:
Number of trains per hour = 12 trains per hour