If you know the Swedish language, will you be able to read both Danish and Norwegian?

Answer 1

Oh yes, quite easily. Understanding spoken Danish is often hard for Swedes, but written Danish is very like Swedish (and Norwegian). There will always be some words that you don't understand, but the languages are very similar, and differences are not so big that you won't understand the text.

Answer 2

Yes all three language just like the three cultures & history are very closely related

so it is like learn 1 and you get 2 moore for free :)