Both of these kanji take the on'yomi, but the first one has a slightly irregular reading, because it's based on the modern Chinese reading. To remember that it's a long らー, just think how excited you are about these ramen! Raaaaaa! Raaaamen! So exciting!
This is my first time eating salmon ramen.
What small companies need in order to grow is ramen.
I spilled ramen soup on my crotch.