Question: Part 3: Calculating Time Zones Determining Times Between Cities In Different Time Zones Is Very Important When Traveling. For Instance You Do Not Want To Call Your Parents At 2 A.m. Even If It Is 3 P.m. Where You Are. Use The Following Steps To Determine The Day And Time In One City When You Know The Day And Time In Another City. Determine The Central …

Part 3: Calculating Time Zones Determining times between citiesin different time zones is very important when traveling. Forinstance you do not want to call your parents at 2 a.m. even if itis 3 p.m. where you are. Use the following steps to determine theday and time in one city when you know the day and time in anothercity. Determine the central meridian of the time zone that eachcity is in. Either add or subtract these central meridians If themeridians are in the same hemisphere – subtract If the meridiansare in different hemispheres – add Divide by 15 (there are 15°/hourin each time zone). This gives you the number of hours differencebetween the two cities. Either add or subtract the number of hoursdifference from the known time. If going from east to west subtractas cities to the west are earlier in the day. If going from west toeast add as cities to the east are later in the day. Example 1:Your friend in Paris, France wants to give you a call but isn’tsure if it is a good time. Currently it is 815 p.m. on a Tuesdaythere. What day and time is it here in Kalamazoo? Central meridianfor Paris, France is 15°E. Central meridian for Kalamazoo is 75°W.Add these since they are in different hemispheres: 15° + 75° = 90°Divide by 15°/hr: 90°/15°/hr = 6 hours difference Subtract thenumber of hours difference from the known time since Kalamazoo iswest of Paris: 8:15 p.m. on Tuesday – 6 hours = 2:15 p.m. onTuesday. Example 2: You decide to study abroad in Moscow while yourbest friend has gone to Sydney, Australia for the year. You decidethat to call her to see how she likes Sydney but need to determineif it is a good time to call. It is currently 9 p.m. on Sunday inMoscow. What day and time is it in Sydney? Moscow, Russia – centralmeridian: 45°E Sydney, Australia –central meridian: 150°E Step 1.Subtract the central meridians because they are in the samehemisphere. 150° – 45° = 105° Step 2. Divide by 15°/hour:105°/15°/hr = 7 hours (difference) Step 3. Add time difference tostarting day and time since Sydney is east of Moscow: 9 p.m. onSunday + 7 hours = 4 a.m. on Monday Probably not a good time tocall because your friend should be asleep.

Question 24 (4 points) If it is 9:45am on Wednesday in Denver(105°W) what day and time is it in London, England? (Show your workto get full credit).

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