The days of our years are threescore years and ten; and if by reason of strength they be fourscore years, yet is their strength labour and sorrow; for it is soon cut off, and we fly away.
Genesis 6:3 says the people of earth (other than Noah) will have 120 years to live, which is why it's approximated that Noah took 120 years to build the ark. (I doubt he spent ALL that time building the ark though. He probably had other stuff to do as well.)