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Finding ZT Of Place B

The ZT at Place A is 0800. If the longitude of A is 49° 30' W, what is the ZT of Place B in longitude 83° 15' W?

Given:

Longitude of Place A = 49° 30' W
Longitude of Place B = 83° 15' W
          ZT at Place A = 0800

Find:

ZT of Place B

Solution:

1. Divide the longitude of Place A and Place B by 15. By doing this, we are converting it to ZD.

 
Longitude of Place A = 49° 30' W ÷ 15 = 3° 18'.  The minutes is less than 30, therefore the ZD would be +3.

Longitude of Place B = 83° 15' W ÷ 15 = 5° 33'. The minutes is more than 30, therefore the ZD would be +6.

2. Next is to subtract the ZD of places A and B to get the time difference.

ZD of Place B =    +6
ZD of Place B = - +3     
Time difference =   3

4. We can solve now for the ZT of Place B.

   ZT of Place A = 0800
Time Difference = - 3       (subtract since Place B is located west of A)
                           0500 is the ZT of Place B

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4 comments:

  1. UnknownAugust 11, 2020 at 3:23 PM

    Good pm/am sir!Sir di naba mag chi-change yung +3 if less than 30 tapos +6 naman kung more than 30?

    ReplyDelete
    Replies
    1. AnonymousNovember 14, 2020 at 6:40 PM

      Tingnan natin yong resulta sa pagdivide. 3 deg 18 mins. Since the minutes is 18 which is less than 30, therefor the ZD is 3.

      If more than 30 mins like the example which is 5 deg 33 mins, so the author converts it to 6.

      Delete
  2. AnonymousMay 10, 2022 at 3:59 PM

    Good afternon paano po malaman na sa west po ung place B po sir?

    ReplyDelete
    Replies
    1. AnonymousMay 11, 2022 at 8:24 PM

      Tingnan mo ang longitude.
      longitude of A is 49° 30' W. And the longitude of B is 83° 15' W.
      Therefore, B is located west of A.

      Delete

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