how can i get proper solution book for pathfinder physics..
Buy it if available.
that i know i am asking is solution are avilable..
I don't think any such good book keeps its original solutions open sourced. Any third party solutions may be present but definitely not for free and online. Pathfinder Physics is a very renouned book for problems, and definitely I can say that you couldn't find its soft copy solutions for free on the internet.
You can refer to the above link and check that a faculty of Allen institute has himself said that its solution aren't even made. I don't think you should waste time dwelling for the solution manuals for good books like this.
Do let me know if you have any further queries