Hi Sheetal
Im not expert but very happy to share with you my experience. I used to struggle with RC for the long time.
To improve RC, you must clarify 2 things.
1. Your Reading ability: if you are weak at this, poor you. You must work extremely hard to improve it. It cannot be improved immediately. You must consistently work day by day during for your prep. My reading ability is also weak when i prepared GMAT. After following BB (gmatclub founder) advice, I started reading Novel. That decision mostly contributes to my very long road. Reading ability is important not only for RC but also CR and SC.
Only one way to improve; read read and read
2. Your strategy: You should work and find a effective way to read and practice your skills.
For me, I read slowly, take note to follow author thought. I thinjk that reading fastly cannot save time. When you read fastly, you dont understand and read again. it costs your time and confidence.