The local solar time at 75°W is 12:00 noon. What is the longitude of an observer who sees the full moon on her meridian at this time?
A) 105°E
B) 75°E
C) 15°E
D) 15°W
E) None of the above

Question

Quizplus · Accepted Answer

The full moon is on the opposite side of the Earth from the sun. So, if the local solar time is 12:00 noon at 75°W, then the local solar time at the longitude of the observer who sees the full moon on her meridian is 12:00 midnight. The difference in longitude between the two locations is 180°. Since the observer is east of the 75°W meridian, the longitude of the observer is 75°W + 180° = 105°E.

The Local Solar Time at 75°W Is 12:00 Noon