"so would the final velocity be 3.60 m/s"
That was the question I was answering earlier when I said to use trig. You need to know the y-component to calculate the final velocity. I was not talking about finding t.
My apologies, I thought the initial post (the one I've quoted second) was in response to v=d/t.^ You need the final velocity to use that equation. Find the time to reach horizontal displacement, then use that time to find the vertical displacement.