time required to reach a fide rating of 2300

Indian railway pays you for playing chess for them(your fide rating should be≥2300). I started playing chess an year ago and my current std chess.com rating~ 1600 would I be able to become a fide master 3 years from now (if I devote 3-4 hrs playing chess on weekdays and 7-8 hrs on weekends) if yes plz suggest a plan.

Just work hard and you'll get to it.  The harder you work, the faster it is.

In fact, 3 years is a reasonable goal.  The average person can reach FIDE master with 4 years of good training.  Seeing that you already have done 1 year and you are already 1600, you're ahead of the schedule.  I say you can make FIDE master in 2.5 more years.

MY TIPS: Do lots of tactics(try to get in 30-50 a day), read a lot of positional books(I suggest Ivan Sokolov's "Winning Chess Middlegames" and Max Euwe's "The Middlegame"), and play as much as you can.  If you devote your 3-4 hours a day(or 7-8 on weekends),  you'll be there in no time.

Cheers.

The first thing I'd do is to question where you heard that 2300 is enough to get employed by Indian Railways.  While that may have been true at some point in the past, who can afford such things today?

Do they advertize for chess players? Do they publish a list of their hiring conditions?

Wow. Looks like I found it online:

http://www.indianrailways.gov.in/railwayboard/uploads/directorate/rail_sport_pro/CIR_PDF/31122010.pdf

One thing. It does state that they are looking to hire people from 18 to 25 years of age. I can't tell from your picture how old you are but it seems you might already be close.

I've been playing for less than a year and my score is like 2,300 in puzzles. I'm not that good at chess the only way I learn things is through YouTube I'm only rated about 1200 in Rapid

1600 to 2300: 4 years
E.g. https://ratings.fide.com/profile/240990/chart