At what height from the ground will the value of $‘g’ $ be the same as that in $10 \,km$ deep mine below the surface of earth ......... $km$
At what height from the ground will the value of $‘g’ $ be the same as that in $10 \,km$ deep mine below the surface of earth ......... $km$
$20$
$10$
$15$
$5$
At what height from the ground will the value of $‘g’ $ be the same as that in $10 \,km$ deep mine below the surface of earth ......... $km$
Same change in the value of $g$ can be observed at a depth $x$ and height $2x$
given
$d = x = 10\,km\,$
$\therefore \,\,h = 2x = 20\,\,km$
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