A high tide is occurring at Charleston, South Carolina (80°W, 33°N). At approximately what other longitude is a high tide occurring?
A) 100°E
B) 80°E
C) 60°E
D) 40°E
E) 20°E

Question

Quizplus · Accepted Answer

The correct answer is A because high tides occur approximately 12 hours apart. When it is high tide at one location, it is low tide at a location 180° away. Charleston, South Carolina is located at 80°W, so a high tide is occurring at approximately 100°E.

A High Tide Is Occurring at Charleston, South Carolina (80°W