What is the local time at 90 degrees East longitude when it is 6:00 AM at the Pr

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Question: What is the local time at 90 degrees East longitude when it is 6:00 AM at the Prime Meridian? (2023)

Options:

Correct Answer: 9:00 AM

Exam Year: 2023

Solution:

90 degrees East is 6 hours ahead of GMT, so 6:00 AM + 6 hours = 12:00 PM.

What is the local time at 90 degrees East longitude when it is 6:00 AM at the Prime Meridian? (2023)

What is the local time at 90 degrees East longitude when it is 6:00 AM at the Prime Meridian? (2023)

Step 1: Understand that the Prime Meridian (0 degrees longitude) is the reference point for time, known as GMT (Greenwich Mean Time).
Step 2: Know that each 15 degrees of longitude represents a difference of 1 hour in time.
Step 3: Calculate how many hours ahead 90 degrees East is from the Prime Meridian. Since 90 degrees is 6 times 15 degrees, it is 6 hours ahead.
Step 4: Start with the given time at the Prime Meridian, which is 6:00 AM.
Step 5: Add the 6-hour difference to the time at the Prime Meridian: 6:00 AM + 6 hours = 12:00 PM.
Step 6: Conclude that the local time at 90 degrees East longitude is 12:00 PM.

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