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Assume earth to be a sphere of a uniform...

Assume earth to be a sphere of a uniform density, What is the value of gravitational acceleration in a mine 100 km below the earth's surface ? Given, R = 6,400 km.

A

`3.9 ms^-2`

B

`7.75 ms^-2`

C

`9.65 ms^-2`

D

`5.25ms^-2`

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