Can I complete RR and SLS in next 50 days if I spend like 2-3 hours everyday ?

Well you can try but in my experience it takes at least 75 - 90 days. Unless you are about to hit the 10 year limit then I would suggest that you aim to start now but go for Period 40. Most students underestimate the time required and even several of mine who started in July are only half way through.

The last day for period 39 submission is November 13th 2019. Counting including today,13th September 2019, its 61 day available to me. How many hours would I have need to spend daily to complete it on time to submit it on November 13th?

First of all consider if you can commit 2-3 hours a day for every single day. What about weekends, holidays? From my experience there are some unexpectd situations when you need to skip a day you planned for prepartion of RR. You can answer based on how do you prepare to ACCA exams. Are you studying every day o rare there shorter or longer breaks? I would recommend to choose period 40 for your submission. Unless there are any other circumsances that will not allow you to do so.