The gravitational force between two masses
kept at a certain distance is f N. The same two
masses are now kept at distance 5 km under sea-water and distance between them remain same.
The gravitational force between them in water is
(Take mass density of water, r = 1000 kg/m3)
Af N
B(f + 5)N
C(f + 0.005)N
Df/5 N
We so not know the distance between the objects at the first case so if the objects are kept at a distance of 3km (lets say) then the force will change this is true for any amount of distance which is not 5 km