Let 'gh' and 'gd' be the acceleration du...

Let '`g_h`' and '`g_d`' be the acceleration due to gravity at height 'h' above the earth's surface and at depth 'd' below the earth's surface respectively. If `g_h=g_d` then the relation between 'h' and 'd' is

`d=1/2 km`

`d=1 km`

`d=3/2 km`

`d=2 km`

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