ㄹ까 는가
I've read that ㄹ까 is more formal than 는가, but ...

Here both forms are being used side by side:

없는가... 혼자 갈까...흐무..

I've also seen other people using both forms. Is there a reason why both are being used?

Question

ㄹ까 는가
I've read that ㄹ까 is more formal than 는가, but ...

Here both forms are being used side by side:

없는가... 혼자 갈까...흐무..

I've also seen other people using both forms. Is there a reason why both are being used?

Answer

I think it mainly depends on the context. Like, in my case, I use "~ㄹ까" informally when I have daily conversation with people. (for example, "우리 뭐 먹으러 갈까? (do you want to go to eat something with me?))  This form is also used in articles to raise questions. For "~는가", I think it's more used for formal reasons, especially in articles. I can't think of using this form in daily conversation :-) I hope my answer helps.