Local Time Calculation Example
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Example 12. If the time at the Greenwich Meridian is 12.00 noon. What is the local time at 40°E?
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Hi Jeska, let's solve this problem together. We need to find the local time at 40 degrees East when it is noon at the Greenwich Meridian.
Calculating Local Time
The Greenwich Meridian is assigned zero degrees longitude. Since we are looking for the time at 40 degrees East, the difference in longitude is simply 40 degrees minus zero degrees, which is 40 degrees.
1. Longitude Difference
We know that the Earth rotates 360 degrees in twenty-four hours. This means that for every one degree of longitude, there is a time difference of 4 minutes.
Next, we multiply our longitude difference of 40 degrees by 4 minutes per degree to find the total time difference in minutes.
2. Time Difference
Forty times four gives us 160 minutes.
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