Multiple choice

Ho w deep one has to dig to reach the centre of the earth?

  1. 6000 km

  2. 5000 km

  3. 4000 km

  4. 3000 km

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

The radius of the Earth, which is the distance from the surface to the center, is approximately 6371 km, often rounded to 6000 km in introductory texts.