Answer
No, the Scripture does not specifically state how long Noah and his sons took to build the Ark, but one would surely assume God gave him enough time and instructions to build this WWII Aircraft Carrier size barge.
Generally, it is accepted that the period is 100 years as Genesis 5 ends with Noah being 500 years old and Genesis 6 states he was 600 years old when the Flood began.
Concerning the cargo, the Bible states only the land animals were to be taken and then due to the early stages of life from Creation, only the 'genera' of a species would be necessary to take - consider the dog family (Canidae) that has wolves, coyotes, jackal, bears, etc. There would be no need to take aquatic life. This would greatly reduce the number of creatures taken and cared for. And as many creatures go into 'topor' or slow down mode, the amounts of food/care would be reduced as well.
When a statistical approach is used, it is easy to see that the ark could have carried its intended cargo. According to John Woodmorappe (Noah's Ark: A Feasibility Study, 1996, p. 7), the total of the animals that Noah would have needed in the ark to meet the biblical requirements would number between 2,000 and 16,000-not in the hundreds of thousands as many might suppose.
120 years X 365 days = 43,800 Oh and leap years do not count because the man who suggested it was not living.
It took Noah 100 yrs to build the ark as said in the bible I don't remember where but I read it in the bible
Did you know that Castles took over 20 years to build!
The Erie Canal took 8 years. It took ten years to build the Panama Canal.
I don't know go 2 wikipdia or it has take about 220 years to build
No, it took about two years to build.
it took three years for the titanic to be constructed
It took 14 years to build Mount Rushmore.:)
It took 5 years to build.
It took 5 years to build.
25 years they want to build the Washington monument
It took 8 years to build the White House.