Hello Chinmay
You may get second hand book from a senior who had give exam ; so ask your seniors or your friends where you are taking coaching and tuitions .
Otherwise you can search on OLX   ;
Also you will get second hand book on a book shop who deal with second hand books ( but it depends upon your area that there is any shop or not )
Ask from book shop near by you ( he has a knowledge and he can tell you where you will get second hand books )

Good luck.