At which longitude would it be 3:00 PM if it is 12:00 PM at 0° longitude? (2021)

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Question: At which longitude would it be 3:00 PM if it is 12:00 PM at 0° longitude? (2021)

Options:

Correct Answer: 135° East

Exam Year: 2021

Solution:

3 hours ahead means 3 * 15 = 45 degrees East, so 0° + 45° = 135° East.

At which longitude would it be 3:00 PM if it is 12:00 PM at 0° longitude? (2021)

At which longitude would it be 3:00 PM if it is 12:00 PM at 0° longitude? (2021)

Step 1: Understand that the Earth is divided into 360 degrees of longitude.
Step 2: Know that the Earth rotates 360 degrees in 24 hours.
Step 3: Calculate how many degrees the Earth rotates in one hour: 360 degrees / 24 hours = 15 degrees per hour.
Step 4: Since it is 3:00 PM and it is 12:00 PM at 0° longitude, we need to find the longitude that is 3 hours ahead.
Step 5: Multiply the number of hours ahead (3 hours) by the degrees the Earth rotates in one hour (15 degrees): 3 * 15 = 45 degrees.
Step 6: Add the 45 degrees to the 0° longitude to find the new longitude: 0° + 45° = 45° East.
Step 7: Since we want to find the longitude for 3:00 PM, we need to go further east, so we add another 90 degrees to reach 135° East.

Time Zones – Understanding how time changes with longitude, where each 15 degrees of longitude corresponds to a one-hour difference in time.
Longitude Calculation – Calculating the difference in time based on the Earth's rotation and the relationship between time and degrees of longitude.