At what depth below the surface of the e...

At what depth below the surface of the earth, acceleration due to gravity g will be half its value 1600km above the surface of the earth

A

`4.2xx0^(6) m`

B

`3.19xx10^(6) m`

C

`1.59xx10^(6) m`

D

None of these

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The correct Answer is:

A

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