What should I put in total marks obtained for 10th as I received CGPA. I don't have individual marks for subjects.

If you have had 6 subjects and you received your scoring in CGPA form, please multiply your score with 9.5. For example,

Math CGPA*9.5 + EnglishCGPA*9.5 + Science CGPA*9.5 + Subject 4*9.5 + Subject 5* 9.5 + Subject 6*9.5

Thisn is for a total of 600 marks.This formula will give you the aggregate marks.

Now to calculate the percentage,

(Aggregate marks/Total marks) * 100

Lets say you have a perfect 10 as CGPA in all your 6 subjects, then your percentage will be 95 and your aggregate will be 95*6 which is 570.

Hello,
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You are filling CAT application right.
And you said you have GPA.
Obviously 10th results will be out in percentage rather then marks.
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So,you can with writing percentage.There nothing gonna happen. It will be fine.
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Even if you aren't Satisfies  then for  your satisfaction you can ask the Person from internet shop what should be written here.He will clear you.
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Hope you are cleared.
Thank you