A sailor listening to a shortwave radio heard that the Greenwich mean time (the time at Greenwich, England) was 12:00 p.m. The sailor looked at her watch, which was set according to the time at a nearby location, and found it to be 3:00 p.m. What is the longitude of the sailor?
What will be an ideal response?
If the earth rotates 15o every hour, then the sailor would be 15o H ? 3 hr = 45o to the west.
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