How to keep the Scale of a gameObject intact even after it becomes child of another GameObject in unity?
Be it Scale,Rotation ,anything related to Transform
The scale does not change if you re-parent the object into a scaled object ,the scale you can see in the inspector is the local scale and that is always dependent on the hierarchy the object is in.
@fffMalzbier : Ya,thnx 
Can you suggest me wat according to you wld be best for moving the Ball in the game named “Unroll Me” ,that’s available online…
I tried using RayCast ,but the turning curves creates difficulty to use that method.I am thinking of adding Force constantly on the ball in forward direction,Let me know !!!