BPSC – Combined Competitive Examination · Question 94
What is the local time at Thimphu (Bhutan), located at 90° East longitude, when it is 12:00 noon at Greenwich (0°)?
Show answer & explanation
Answer: (A) 6:00 p.m.
Explanation
Each degree of longitude equals 4 minutes; places east are ahead, so 90°E is 6 hours ahead.
- (A) Correct
Correct: 90° × 4 min = 360 min = 6 hours ahead → 6 p.m.
- (B) Incorrect
Wrong: this is only 4 hours ahead.
- (C) Incorrect
Wrong: 7 hours would be 105°E.
- (D) Incorrect
Wrong: east of Greenwich is ahead, not behind.