Hi Sureendra. I would browse through the comments on this forum, loads of people share their exam tips. You could do a search for "%" to bring up posts where other people have shared their scores in the exam simulator to give you an idea of whether your scores are in the right zone.
It is normal that your scores will vary for each chapter, because some topics you'll naturally be stronger in than others. In my opinion, 40% on risk management would indicate to me that was an area worth revising. Read the question explanations for each answer and review the reference material, then try the test again.
A month to go is still plenty to get ready, so good luck!
Also, I noticed this question had posted twice in the forum so I have deleted the other one so all your responses are consolidated on this thread.