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Wednesday, February 20, 2013

Calculate time using longitudinal position of the place

lines of longitude




Q. What are longitudinal lines?
Ans. Longitudinal lines are imaginary vertical lines over the Earth's globe.



0° longitudinal line is Greenwich Prime Meridian.
180° longitudinal line is International Date Line.






lines of latitude
Q. What are latitudinal lines?
Ans. Latitudinal lines are imaginary horizontal lines over the Earth's globe.


0° longitudinal line is Equator.


Earth completes one rotation on its axis in 24 hours and in the process turns a complete circle of 360°. This means Earth rotates 360°/24 = 15° in one hour.

 Difference of time for 15° longitude = one hour.
Difference of time for 1° longitude = 4 minutes.




Q. Calculate the time at 74° W longitude (New York) when it is 12 a.m. at 82½° E longitude (India)?
Ans. longitude of India = 82½° 
longitude of New York = 74° 
Difference in longitude = 82½° - (-74°) = 156½°
Difference of time for 1° longitude = 4 minutes
Difference of time for 8½° longitude = 4*(156½) = 626 minutes OR 626/60 = 10 hours 26 minutes
As New York is in the west of India, the time at New York will be less than India
Therefore Time of New York = 12 - 10.26 = 01:34 p.m.
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20 comments:

  1. Anonymous7/24/2014 10:41 AM

    Thanq its good

    ReplyDelete
  2. Anonymous3/15/2017 8:35 PM

    Arey rajababu idiot the answer is 1:43 pm

    ReplyDelete
    Replies
    1. Anonymous4/12/2017 2:45 PM

      The answer is correct you non sense.

      Delete
  3. Unknown8/07/2018 10:59 PM

    My answer is also 1.34 pm

    ReplyDelete
  4. Unknown8/31/2018 11:17 AM

    Thanks

    ReplyDelete
  5. Unknown3/02/2019 7:49 PM

    Thanks

    ReplyDelete
  6. Unknown3/29/2019 8:08 AM

    Thanks

    ReplyDelete
  7. Unknown3/29/2019 8:08 AM

    Thanks

    ReplyDelete
  8. Unknown6/25/2019 7:38 PM

    Using only time how to find latitude and longitude please answer and email me

    ReplyDelete
  9. Unknown8/28/2019 7:52 PM

    Yes the answer is correct

    ReplyDelete
  10. Unknown11/15/2019 6:47 PM

    No it is 0.34 pm

    ReplyDelete
  11. Unknown11/26/2019 7:12 AM

    Helpful indeed

    ReplyDelete
  12. Unknown1/28/2020 4:25 AM

    Thanks

    ReplyDelete
  13. Unknown2/19/2020 1:30 PM

    Q. At Nairobi on longitude 37°E local time is 1p.m.What time would it be at Garissa on longitude 41°E?

    I just want to confirm if I got my answer right before explaining it to the kids please helping out with their assignments

    ReplyDelete
    Replies
    1. Anietie Kingsley(DePathfinder)2/28/2020 3:00 AM

      Longitude at Nairobi = 37degE
      Longitude at Garissa = 41degE
      longitude difference = 41-37 = 4 hours.
      Local time at Garissa = 13.00hours
      13+4 = 17:00hours
      The time at Garissa will be 17:00hours or 5p.m. Garissa is ahead of Nairobi.

      Delete
    2. Unknown9/28/2020 12:57 PM

      Longitude difference is 4°×4min= 16min therefore local time is 1:16 pm

      Delete
  14. Anietie Kingsley(DePathfinder)2/28/2020 2:55 AM

    great work

    ReplyDelete
  15. Unknown6/14/2020 9:29 PM

    Answer is 1.74pm

    ReplyDelete
  16. Unknown6/17/2020 2:31 PM

    ii wanted a calculator:< :{ :$ :(

    ReplyDelete
  17. Unknown9/28/2020 12:49 PM

    Thanks a lot

    ReplyDelete

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