Formula is
You can find that object touches the ground at 2.26 seconds
Find how far it went at 2 seconds and do 25m minus this answer
it only takes a bit over 2.2 seconds to hit the ground from a height of 25 m, so asking how far it travels in the third second is poorly posed.
if it had enough height to fall the "third" second, then from t = 2 to t = 3 seconds ...
if the intent was to determine the distance it fell from t = 2 seconds until it hits the ground, ...
leaving 5.4 m to fall from t = 2 to impact.