Find the value of acceleration due to gr...

Find the value of acceleration due to gravity in a mine at a depth of 80 km from the surface of the earth . Radius of the earth = 6400 km .

A

900 `cm//s^2`

B

980`cm//s^2`

C

987.5`cm//s^2`

D

1000`cm//s^2`

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The correct Answer is:

C

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