What will be percentage decrease in weight of body when taken to the depth of 64 km below the surface of earth ?

Explanation

`g. = g(1-(d)/(R ))`
`g. - g = (-gd)/(R )`
`g - g. = (gd)/(R )`
percentage decrease in weight `= ((mg - mg.)/(mg))xx 100`
`= ((g-g.)/(g)) xx 100`
`= (gd)/(Rg) xx 100`
`= (d)/(R ) xx 100`
`= (64)/(6,400) xx 100`
= 1%