If it is 9:00 AM at 90°W, what is the time at 30°E?

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Question: If it is 9:00 AM at 90°W, what is the time at 30°E?

Options:

Correct Answer: 3:00 PM

Solution:

90°W to 0° is 6 hours ahead, and 0° to 30°E is 2 hours ahead, total = 8 hours ahead, so 9:00 AM + 8 hours = 5:00 PM.

If it is 9:00 AM at 90°W, what is the time at 30°E?

If it is 9:00 AM at 90°W, what is the time at 30°E?

Step 1: Understand that time changes as you move east or west on the globe. Each 15 degrees of longitude represents 1 hour of time difference.
Step 2: Identify the starting point, which is 90°W. This means we are 90 degrees west of the Prime Meridian (0°).
Step 3: Calculate the time difference from 90°W to 0° (the Prime Meridian). Since 90° is 6 hours behind 0°, we add 6 hours to the time.
Step 4: Now, we are at 0° and need to find the time at 30°E. Since 30°E is 30 degrees east of the Prime Meridian, we calculate the time difference from 0° to 30°E. This is 2 hours ahead.
Step 5: Add the time differences together: 6 hours (to get to 0°) + 2 hours (to get to 30°E) = 8 hours ahead of 9:00 AM.
Step 6: Finally, add 8 hours to 9:00 AM. This gives us 5:00 PM.

Time Zones – Understanding how time changes with longitude, where each 15° of longitude corresponds to a one-hour difference in time.
Longitude Calculation – Calculating the time difference based on the degrees of longitude between two locations.