A difference of 15 degrees of longitude equals how much local time?
- One day
- One minute
- Four hours
- One hour
Show answer and solution
Correct answer: D. One hour
1. The Earth turns 360 degrees in 24 hours.
2. So each 15 degrees of longitude is one hour of local time.
3. Four hours would need 60 degrees, so that option fails.
_Source: Wikipedia, Longitude, Lead section_