That depends on your skill set.
- If you are a University student with sufficient knowledge, you can earn money via tuitions. You will have to do 3 or 4 tuitions to reach that mark.
- You can also take classes in coaching centers. They pay around 200–300 BDT.
- If you have good writing skill, you can freelance that to earn some extra bucks. Some web portals offer money for articles. e???? is one such option
To generalize, you can freelance any skills that you have. Web development, designing or marketing – you name it. But ofcourse freelancing doesn’t guarantee regular flow of money.