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When it is Saturday 8 p.m at 90°W, what will be the time of 120°E?

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When it is Saturday 8 p.m at 90°W, what will be the time of 120°E?

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  • Longitudinal extent from Greenwich to 90°W:90°. 
  • Longitudinal extent from Greenwich to 120°F: 120°. Total longitudinal extent : 2100(90+ 120). 
  • The difference of 15° longitude: 1 hour.
  • The difference of 210° longitude : \(\frac{120}{15}\) = 14 hours. .
  • For each 150 longitudes, time will be ahead by 1 hour from west to east. 
  • The time at 120°E will be ahead by 14 hours from the time at 90°W. 
  • The time of 120°E will be Sunday 10 a.m.
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