What is the angular distance in degrees between two longitudes that are 4 hours

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Question: What is the angular distance in degrees between two longitudes that are 4 hours apart in time? (2021)

Options:

Correct Answer: 60 degrees

Exam Year: 2021

Solution:

The Earth rotates 360 degrees in 24 hours, so in 1 hour it rotates 15 degrees. Therefore, in 4 hours, it rotates 4 * 15 = 60 degrees.

What is the angular distance in degrees between two longitudes that are 4 hours apart in time? (2021)

What is the angular distance in degrees between two longitudes that are 4 hours apart in time? (2021)

Step 1: Understand that the Earth rotates 360 degrees in 24 hours.
Step 2: Calculate how many degrees the Earth rotates in 1 hour by dividing 360 degrees by 24 hours. This gives you 15 degrees per hour.
Step 3: Since the question asks for the angular distance between two longitudes that are 4 hours apart, multiply the degrees rotated in 1 hour (15 degrees) by 4 hours.
Step 4: Perform the multiplication: 15 degrees/hour * 4 hours = 60 degrees.
Step 5: Conclude that the angular distance between the two longitudes is 60 degrees.

Earth's Rotation – The Earth rotates 360 degrees in 24 hours, leading to a rotation of 15 degrees per hour.
Time and Longitude Relationship – The relationship between time and longitude, where each hour difference corresponds to a 15-degree difference in longitude.