Geography PYQ 348 of 587 · Universe, Solar System & Earth · Longitude

What is the local time of Thimphu (Bhutan) located at 90° East longitude when the time at Greenwich (0°) is 12:00 noon?

  1. A6:00 p.m
  2. B4:00 p.m
  3. C7:00 p.m
  4. D6:00 a.m

69th B.P.S.C. (Pre) 2023

Show answer and explanation

Correct answer: (a) 6:00 p.m

Explanation

There is a time difference of 4 minutes for every 1° of longitude. Thimphu is 90° east of Greenwich, so the difference is 90 × 4 = 360 minutes, or 6 hours. Places east of Greenwich are ahead of it, so when it is 12:00 noon at Greenwich, the local time in Thimphu is 6:00 p.m.

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