Question

If it is 12 noon at 60 degree east longitude then explain what would be the time at 30 degree west longitude

Answer 1

First we have to find the difference in degrees between the two points, this gives (60+30)=90,(hint:east and west longitudes, you add). Also we know that 1 degree is equivalent to 4 minutes. Converting the difference in degrees between the two points into minutes gives, 90 by 4 which is equal to 360 minutes.Converting the minutes into hours gives 360/60=6 hours, this is because we know that 1 hour =60 minutes, then the time at 30 degrees west will be 12 noon subtract 6hours because it behind the prime meridian, which gives 6 am. Thus time 30 degrees west is 6 am.

Answer 2

6.00 am

Explanation:

• We know that local time of any place is determined by its "longitudinal location"
• The time at 30°W longitude can be ascertained with reference to "know the time" at any given "longitudinal location"
• The difference in the "longitudinal stretch" with "known reference" = 60°E -30°W = 90°
• Time that is taken to "travel longitudinal degree" = 4 minutes
• Time taken for 90° = 90 * 4 = 360 minutes = 6 hours.
• Therefore, if it is 12 noon at 60°E longitude, then time at 30°W longitude is 6.00 AM

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