How many kilometers deep is the mantle?

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A 3
B 3000
C 300000
D 0.3

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Answer: B. 3000

The mantle is the thick layer just below the Earth's crust. It reaches down to about 2,900 km, roughly 3,000 km. Values like 3 km or 0.3 km are far too small.

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How many kilometers deep is the mantle?

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