How Long Did It Take Noah to Build the Ark?

Assuming the biblical lunar calendar of 360 days, Noah stayed on the ark for roughly 370 days. He brought seven of each kind of animal that was acceptable for sacrifice, or clean. He brought two of each other kind of animal. The Bible claims that the flood was cataclysmic, killing every human worldwide except for Noah and his family, meaning every person alive since is descended from his family.