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The time difference in Local Mean Time between sunset at positions A 50°N, 120°E and B 50°S, 120°E on the 21st of November is…
  • A
    some hours and the Sun rises earlier in B than in A.
  • B
    negligible small because A and B are located symmetrically to the Equator.
  • C
    negligible small because A and B are located at the same meridian.
  • D
    some hours and the Sun rises earlier in A than in B.

Question asks about difference between sunset times of two points that are located on same meridian but in different hemisphere, north and south.
21st of December is shortest daylight time in Northern Hemisphere and longest in Southern Hemisphere. 21st of November is 1 moth before this time. So we can say, in North hemisphere, daytime is still shorter than South hemisphere.
Thus, at position B, sun rises earlier and set later than position A - Both positions are located high latitudes.

LMT itself is the same in both locations as they are in the same longitude but the difference is sunset time.

Correct Answer: Some hours and the sun rises earlier in B than A.

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