The correct answer is 2:48 PM of 31st December 2016. Key Points Perth located at 118° East Longitude celebrated the New Year event on the 1st of January 2017 at 6:00 AM. Los Angeles is located at 1100 West Longitude. The difference in the longitude of Perth and Los Angeles = 110∘ − (−118∘) = 228∘. Greenwich Mean Time is considered to be located at a longitude of zero degrees. One hour of time difference corresponds to 15° of longitude. 10 Longitude= 4 Minutes. The difference is 228º, (228*4 = 912 Minutes) which is 15 hours 12 minutes. Since the longitude of Los Angeles is lesser than Perth, time at Los Angeles would be before 15 hours 12 minutes than Perth. i.e. 6:00 AM - 15: 12 = 2: 48 (31st December) Hence, at the time New Yeat event on 1st January 2017 at 6.00 am, Los Angeles had 2:48 PM of 31st December 2016.