Difference in time is equal to 15h-9h=6h
Since there are 24 hours in a day and 360 degrees in a circle, the sun moves across the sky at a rate of 15 degrees per hour (360° ÷ 24 hours = 15° per hour).
In this case, person is near 90° longitude (6 hours × 15° per hour = 90°).
If your latitude was calculated at 62 degrees north and the universal time ahead of the local time then longitude is 90° eastern longitude.
90° eastern longitude
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