Two men tried to lift a 95-kilogram sack of grain to a storage room on the second floor using ropes. Just as the sack reached the second floor, the rope broke and the sack dropped and hit the ground. The kinetic energy of the sack was 3500 joules just before it struck the ground. Given g as 9.8 meters per second squared and providing your answer to the nearest meter, what was the height of the second floor?