Hi Mukesh,

Since you already have your Learner's License Number I believe that you have obtained the same after appearing for the online test at the concerned RTO. So you have an application form before that exam that you carried with you for appearing in that test.

Now you need to carry that application for Learner's Driving License and some photocopies of the same to the RTO and tell them that you have lost your LLR. They would charge a nominal sum of around Rs.10 to Rs.20 and they would issue you a new copy of the LLR that you are supposed to use as original from then.

BEST WISHES!