Find the percentage decrease in the weight of the body when taken to a depth of `32 km` below the surface of earth. Radius of the earth is `6400 km`.

Explanation

Here, `d = 32` km, `R = 6400 km`.
Weight of body at depth `d` is `= mg' = mg (1 - (d)/(R ))`
`%` decrease in weigth `= (mg - mg')/(mg) xx 100 = (d)/(R ) xx 100 = (32)/(6400) xx 100 = 0.5%`