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Working with Time>
Time Difference and Longitudes>
Time Difference and Longitudes 3Time Difference and Longitudes 3
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Question 1 of 4
1. Question
Find the local time in Rome given the following:Rome `(42°N,12°E)`Buenos Aires `(35°S,58°W) 10`am TuesdayHint
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The prime meridian is a line of longitude at `0°`On the opposite side of the prime meridian lies the `180°` meridian.Finding the Time Difference
`1°` of longitude to the west `=` subtract 4 minutes (West = lest)`1°` of longitude to the east `=` add 4 minutes (East = beast)First, draw a rectangle with the Prime Meridian and two longitudesSince one longitude is the west and the other is to the east, the Prime Meridian should be in the middle
The prime meridian is also called Greenwich Mean Time (GMT) or Coordinated Universal Time (UTC)Draw a line that connects the two longitudes
This represents a plus sign, which means we must get the sum of the two longitudes`12°+58°` `=` `70°` Next, solve for the minute difference by multiplying `4``70°``xx4` `=` `280` minutes Since Rome is to the east of Buenos Aires, add `280` minutes to `10`am`10`am `+280` minutes `=` `10`am `+4` hours `40` minutes Divide minutes by `60` to convert to hours `=` `10°00°+04°40°` press the DMS button on the calculator for every `°` `=` `14°40’` The time is in pm or in the afternoon since it is greater than `12`.Subtract `12` hours to get a proper time format`1440` hours `-12` hours `=` `02:40`pm The time in Rome is `02:40`pm Tuesday`02:40`pm Tuesday -
Question 2 of 4
2. Question
Find the local time in Lisbon given the following:Lisbon `(39°N,9°W)`Los Angeles `(34°N,118°W) 2`pm WednesdayHint
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The prime meridian is a line of longitude at `0°`On the opposite side of the prime meridian lies the `180°` meridian.Finding the Time Difference
`1°` of longitude to the west `=` subtract 4 minutes (West = lest)`1°` of longitude to the east `=` add 4 minutes (East = beast)First, draw a rectangle with the Prime Meridian and two longitudesSince both longitudes are to the west, the Prime Meridian should be drawn last
The prime meridian is also called Greenwich Mean Time (GMT) or Coordinated Universal Time (UTC)Draw a line that connects the two longitudes
This line represents a minus sign, which means we must get the difference between the two longitudes`118°-9°` `=` `109°` Next, solve for the minute difference by multiplying `4``109°``xx4` `=` `436` minutes Since Lisbon is to the east of Los Angeles, added `436` minutes to `2`pm`2`pm `+436` minutes `=` `2`pm `+7` hours `16` minutes Divide minutes by `60` to convert to hours `=` `14°00°+07°16°` Convert `2`pm to military time by adding `12` `=` `21°16’` `=` `2116` hours The time is in pm or in the afternoon since it is greater than `12`.Subtract `12` hours to get a proper time format`21:16-12` hours `=` `09:16`pm The time in Lisbon is `09:16`pm Wednesday`09:16`pm Wednesday -
Question 3 of 4
3. Question
Find the local time in Barcelona given the following:Barcelona `(41°N,2°E)`Singapore `(1°N,104°E) 5:30`am TuesdayHint
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Excellent!
Incorrect
The prime meridian is a line of longitude at `0°`On the opposite side of the prime meridian lies the `180°` meridian.Finding the Time Difference
`1°` of longitude to the west `=` subtract 4 minutes (West = lest)`1°` of longitude to the east `=` add 4 minutes (East = beast)First, draw a rectangle with the Prime Meridian and two longitudesSince both longitudes are to the east, the Prime Meridian should be drawn first
The prime meridian is also called Greenwich Mean Time (GMT) or Coordinated Universal Time (UTC)Draw a line that connects the two longitudes
This line represents a minus sign, which means we must get the difference between the two longitudes`104°-2°` `=` `102°` Next, solve for the minute difference by multiplying `4``102°``xx4` `=` `408` minutes Since Barcelona is to the west of Singapore, subtract `408` minutes to `5:30`am`5:30`am `-408` minutes `=` `5:30`am `-6` hours `48` minutes Divide minutes by `60` to convert to hours `=` `05°30°-06°48°` press the DMS button on the calculator for every `°` `=` `-1°18’` Since the answer is negative, it means the time we are looking for occurs the day before which is MondaySimply add `24` hours to convert it to military time`-1°18’+24°` `=` `22°42’` `=` `2242` hours The time is in pm or in the afternoon since it is greater than `12`.Subtract `12` hours to get a proper time format`22:42-12` hours `=` `10:42`pm The time in Barcelona is `10:42`pm Monday`10:42`pm Monday -
Question 4 of 4
4. Question
Find the local time in Seattle given the following:Seattle `122°W`Dubai `55°E, 4`pm MondayHint
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The prime meridian is a line of longitude at `0°`On the opposite side of the prime meridian lies the `180°` meridian.Finding the Time Difference
`1°` of longitude to the west `=` subtract 4 minutes (West = lest)`1°` of longitude to the east `=` add 4 minutes (East = beast)First, draw a rectangle with the Prime Meridian and two longitudesSince one longitude is the west and the other is to the east, the Prime Meridian should be in the middle
The prime meridian is also called Greenwich Mean Time (GMT) or Coordinated Universal Time (UTC)Draw a line that connects the two longitudes
This represents a plus sign, which means we must get the sum of the two longitudes`122°+55°` `=` `177°` Next, solve for the minute difference by multiplying `4``177°``xx4` `=` `708` minutes Since Seattle is to the west of Dubai, subtract `708` minutes to `4`pm`4`pm `-708` minutes `=` `4`pm `-11` hours `48` minutes Divide minutes by `60` to convert to hours `=` `16°00°-11°48°` Convert `4`pm to military time by adding `12` hours `=` `4°12’` `=` `4:12`am The time in Seattle is `04:12`am Monday`04:12`am Monday
Quizzes
- Convert Units of Time 1
- Convert Units of Time 2
- Convert Units of Time 3
- Add Units of Time
- Subtract Units of Time
- Convert 12 Hour Time to 24 Hour Time 1
- Convert 12 Hour Time to 24 Hour Time 2
- Convert 12 Hour Time to 24 Hour Time 3
- Convert 24 Hour Time to 12 Hour Time 1
- Convert 24 Hour Time to 12 Hour Time 2
- Add and Subtract Time Using the Calculator
- Time Difference and Longitudes 1
- Time Difference and Longitudes 2
- Time Difference and Longitudes 3
- International Time Zones 1
- International Time Zones 2
- Time and Travelling Word Problems 1
- Time and Travelling Word Problems 2
- Great Circle Distances