Solved UPSC CDS/OTA Question
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Q · Longitudemedium · 45s
How many degrees of longitude does the Earth rotate per hour?
TopicLongitude
Question Typemultiple choice
Difficultymedium
Test Duration30 min
Step-by-Step Solution
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Earth completes a 360° rotation in approximately 24 hours, which means it rotates about 15° per hour. This is the fundamental reason for the division of the globe into 24 standard time zones, each representing 15° longitude.
Final Answer: Option A - 15°