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Which one is thickness of outer core of earth

A. 2,130 km
B. 2,750 km
C. 2,500 km
D. 2,250 km

Answer & Solution
Option: D
Explanation :The outer core of the Earth is a liquid layer about 2,260 kilometers thick. It is made of iron and nickel. This is above the Earth’s solid inner core and below the mantle. Its outer boundary is 2,890 km (1,800 mi) beneath the Earth’s surface. The transition between the inner core and outer core is approximately 5,000 km (3,100 mi) beneath the Earth’s surface.
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