Answer:
15 degrees
Explanation:
You want to know the separation longitude of the 24 time zones on Earth.
Time zone
The 360° of longitude is divided into 24 time zones (and some extras). Their average separation in longitude is ...
360°/24 = 15°
On average, time zones are separated by 15 degrees of longitude.
__
Additional comment
Time zone borders are generally based on political considerations as well as longitude. Some adjacent time zones are separated by 1/4 or 1/2 hour, rather than 1 hour.
<95141404393>