Multiple choice

The approximate radius of Earth is

  1. 3452 km

  2. 1290 km

  3. 6371 km

  4. 5400 km

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Earth's mean radius is approximately 6,371 kilometers (about 3,959 miles). This value represents the average distance from Earth's center to its surface. The other options are either too small (like 1,290 km, which is closer to the Moon's radius) or don't match the accepted scientific value.

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