-->> After passing out as a mechanical engineer i think getting this salary is very much easy. but now you should not think about salary. just concentrate on your study and do well in all field.
if you have good knowledge than surely you will get a good job from your college or from offline campusing. they will give you a very good salary. you have a very good marks so i think you have very good theoretical knowledge no doubt.
but now you have to increase your practical knowledge. take training from very good industry. try to visit industry, consult with industry people for improvement of your knowledge. sure you will get the best.
whenever you will get job do not think about salary think about job satisfaction. because job satisfaction is the best thing to be successful later. so you should think about this. but salary is also important. you can not do many job with a less salary.
As regards the placements are concerned, you can absolutely try outside of your college. Companies are always in search of meritorious students like you. You can try your luck in the following core companies:
Ashok Leyland Ltd
Axles India Ltd
Addison & Co Ltd
Bharat Electronics Ltd.
Hindustan Motors Ltd
Hyundai Motors India Ltd
Mahindra & Mahindra
Royal Enfield Ltd
Steel Authority of India Limited
Tube Investments of India Ltd