"Esta situado en la cosa."
Please kindly confirm if the following sentence means it is located on the coast****."Esta situado en la cosa." I guess it is a passive sentence. Can you also advise the infinitive form of estuado.
situado means located -- gerund form from situar
No, it means "it's located in the thing"; cosa=thing....
"coast" in Spanish is "costa", and the whole sentence would be:
"Está situado en la costa".
Regarding the second part of your question, "estuado" could come from "estar" or "estudiar", but the way you typed it, doesn't really match the conjugations of any of these. Are you sure you got the right typing?