I have submitted one lecture duration 9:50 min;
Do you mean a lecture (single) or entire Course? and either way you uploaded only 9:50 (around 10 minutes) of lectures?
Am I understanding it right?
Regardless, Udemy is reviewing a COURSE in its entirety, NOT separate lectures. I mean that you are not uploading lectures one by one and submitting reviews every time. You upload all the lectures as an entire course and only then submit it for review. However, if you will want to add more lectures AFTER Udemy will review and publish the course, you can do it as well.
As for the payment. Udemy is taking taxes before they will pay you, and the tax rate depends on the country where you live. However, what they tax can be much higher than what you would be taxed in your country. I would suggest you watch this video if you will have a hard time understanding Udemy's tax (This is Unofficial of course).
As for the production. I am pretty sure here you mean the course because the production of the lecture really takes a very small time (comparatively speaking). For me personally it takes around a month to make a course (scripting, recording, editing). For some it takes much less, for some it may take more. In my case, I talk at least a 4-6 hour course.
I hope this helps.
@SurajBhagat950 yes each lecture goes through the review process. once you complete the course then submit it for the Quality review process, it will take 7-8 business days for review. once your course will pass the quality test your course will be on air.