Multiple choice

What is the longitude of a town if its local time is 6 P.M. when the Greenwich time is 4 P.M.?

  1. 20°E

  2. 30°E

  3. 20°W

  4. 30°W
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Each 15° of longitude represents 1 hour time difference, and east of Greenwich is later time. The town is 2 hours ahead (6 PM vs 4 PM), so 2 × 15° = 30° east longitude. If it were west longitude, local time would be earlier than Greenwich. This is standard time zone calculation.

Keep practicing — related questions