The longitude of this place where time is 9:00 am and prime meridian time is 3:00 pm is 90°W.
Here it is given that time = 9:00 am
and the prime meridian time = 3:00 pm.
So, the given time is 9:00 am that is am means early which tells us that it is west.
Now, the 9 am to 3 pm difference is of 6 hours.
That means it is 6 hours earlier.
So, the longitude = 6hr * 15°/hr = 90°W
Hence, the longitude is 90°W.
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