I need some help on doing the process of the following problem:

A body falls freely from rest and half of his fall is done in the last second. Calculate the total time of the fall.

I know that the time on the first path is t-1. Also that I can equalize distance equations to obtain time. But I don't know how.
Can you help me?

Forget it I already obtained the answer. Is 3.41 seconds, right?