If its 12 noon at greenwich
what us the time at 16 degrees west

Explanation:

The time is 12:00 noon in “Greenwich” by using Greenwich Mean Time (GMT) we can calculate the time in your present location. From the question we know that present location is 16° west.

If we are in west of the “Greenwich median” we need to “subtract” the time from actual Greenwich Mean Time (GMT) your time is ahead. If we are in the east of the “Greenwich median” we need to “add” the time from actual Greenwich Mean Time (GMT) your time will be “after”.

To find the time at 16° west:

We know that 1° = 4 minutes, present location is 16° west then 16 × 4 = 64 minutes = 1 hour 4 minutes. We need to subtract 1 hour 4 minutes from actual time 12:00 noon it becomes 10:56.