You: How does this mean that man will not live longer than 120 years?
Me: That statement alone is open to interpreation. One is that God limited man's age to 120 years, which obviously is not the case. Another is: man--from that time the word as spoken--has more or less 120 years till he is eliminated
You:Also, are you saying that the Ark took almost 120 years to build?
Me: I don't have my bible w/ me right now. But, I believe it is silent as to the time span of the building of the ark. With the size of the ark, coupled w/ Noah's inexperience, old age, and few helpers the building of that life boat would really take long. And remember also that Noah had other jobs to do. One of this, according to Peter, was to preach.