Hi Aparna,

if you gets the 70 marks in physics and 90 in mathamatics and chemistry then It is a big achievement for you.Seeing your interest in engineering,I would like to give you some advise about the engineering from where you get the idea that how can you get the a better engineering college.

Once you will get the engineering college then it totally depends on you that your CGPA will be decrease or increase. if you will study with deep heart then of coursse you will get better results i mean, you will get better CGPA .

NOW i am giving the idea how will you get engineering college after 12th class .

First you have to Clear  the IIT,JEE MAINS exam with good range of marks then you can be able to get the better engineering college.apart from this i would like to tell you a better college in india .

1. Indian institute of technology Bombay(IIT B)

2.Indian institute of technology Delhi(IIT D)

3.Indian institute of technology Madras (IIT M)

4.Indian institute of technology Kanpur(IIT K)

5.Indian institute of technology kharagpur(IIT k)

6.Indian institute of technology Roorkee(IIT R)

7.Indian institute of technology Jodhpur(IIT J)

8.Indian institute of technology Mandi(IIT M)

9.Indian institute of technology BHU

10.Indian institute of technology Guwahati(IIT G)

Apart from this i will you suggest some National Institute of Technology (NIT) .

1.National Institute of Technology Tirchy (NIT T)

2.National Institute of Technology  Warangal(NIT W)

3.National Institute of Technology  Calicut(NIT C)

4.National Institute of Technology Allahabad (NIT A)

5.National Institute of Technology Jaipur (NIT J)

6.National Institute of Technology Bhopal(NIT B)

7.National Institute of Technology Kurushetra(NIT K)

8.National Institute of Technology Hamirpur(NIT H)

9.National Institute of Technology Jhalandhar (NIT J)

10.National Institute of Technology  Manipur (NIT M)

All above the best or top engineering college in India with lower college fee with better college environment and good Placement.

Hope you are satisfied with answer.

Comment below if have any query.

Keep Learning.