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Question

The mantle layer of the earth is _____ in thickness.

A
100 - 2900 kms
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B
200 - 4000 kms
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C
300 - 4500 kms
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D
400 - 5000 kms
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Solution

The correct option is A 100 - 2900 kms
The Earth's mantle is a layer of silicate rock between the crust and the outer core. It has a mass of 4.01 × 1024 kg and thus makes up 67% of the mass of the Earth. It has a thickness of 2,900 kilometres (1,800 mi) making up about 84% of Earth's volume.
The correct answer is A.

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