Additional depreciation rate ?

For P.Y 2010-11, the rate of additional depreciation would be 10% since the machinery was used for less than 180 days.

Yes 10% only.

Instead if they had put it to use after another day they would be eligible for 20% depreciation .

But anyways that would be for the next year.

So does it mean that the following rule applicable for Normal Dep is not applicable here -  

" if asset aquired in one PY is put to use in another PY then dep would be at full rate & not 50% whether or not the asset is put to use for less than 180 days" 

20 % of actual cost n it wil be 10 % if used if concept of 180 days wil aply