san francisco is approximately 120 degree west of london. An observer in london sees a clock at 15:30. How long will it be before a clock in San Francisco displays the same time?
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san francisco is approximately 120 degree west of london. An observer in london sees a clock at 15:30. How long will it be before a clock in San Francisco displays the same time?
Time Zones vary in width but are broadly 15° with varying distances.
Moving to the East and into another timezone means adding an hour. Moving to the next time zone to the west results in subtracting one hour.
Questions may involve asking for a calculation involving the time at any one moment or calculating time zone based on degree difference.
If asked about a location a number of degrees away remember the Earth can be represented as a circle which is 360°. We calculate positions up to 180° West and East with London set as 0°. If a location is 90° away that is 1/4 of 360. 1/4 of 24 hours is 6 hours so it is likely (but not always) that the other location is 6 timezones away.
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san francisco is approximately 120 degree west of london. An observer in london sees a clock at 15:30. How long will it be before a clock in San Francisco displays the same time?
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