To determine the longitude of a place X when its local time is 8.00 am and the local time at the Greenwich Meridian (0°) is noon, we need to calculate the time difference between the two locations and convert it into degrees of longitude.
Since the Earth rotates 360 degrees in 24 hours, the time difference between each hour of time corresponds to 15 degrees of longitude. Therefore, for each hour, the longitude difference is 15 degrees.
Given that the local time at Greenwich Meridian (0°) is noon (12.00 pm) and the local time at place X is 8.00 am, the time difference is 4 hours.
To convert the time difference into degrees of longitude, we multiply the time difference (4 hours) by the longitude difference per hour (15 degrees):
4 hours * 15 degrees/hour = 60 degrees
Therefore, the longitude of place X is 60 degrees.