Multiple choice

How many minutes for each degree of longitude does the local time of any place vary from the Greenwich time?

  1. Two minutes

  2. Four minutes

  3. Six minutes

  4. Eight minutes

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Earth rotates 360 degrees in 24 hours. Therefore, it rotates 15 degrees in one hour (60 minutes), meaning each degree of longitude corresponds to 4 minutes of time difference.