Question

If it is 7 am at 30 degrees west, what will be the time at prime meridian

Answer 1

Explanation:

List of prime meridians on Earth

Locality Modern longitude Meridian name

Bering Strait 168°30' W

Washington, D.C. 77°03′56.07″ W (1897) or 77°04′02.24″ W (NAD 27) or 77°04′01.16″ W (NAD 83) New Naval Observatory meridian

Answer 2

The difference in the longitudinal stretch with known reference = 60°E - 30°W =90°

Time is taken to travel longitudinal degree = 4 minutes

Time taken for 90° = 90*4 = 360 minutes = 6 hours

Thus, if it is 12 noon at 60°E longitude, then time at 30° W longitude would be 6 AM.