Hi Hrudya.

With a rank of 550, you won't get admission for B.Arch at RIT, if you're a general candidate. the cutoff is different for different categories. So, depending on your category, you may or mayn't have chances. You can check the cutoff in this page.

https://engineering.careers360.com/colleges/rajiv-gandhi-institute-of-technology-kottayam/cutoff

Good Luck.