Duration And Coverage Of The Flood

Gen 7:11-12 . . . on that day all the fountains of the great deep were broken up, and the windows of heaven were opened. And the rain was on the earth forty days and forty nights. The flood covered the entire world. After a period of 150 days the Ark rested on Mt. Ararat (17,000 ft.) 200 miles North of the ancient city of Nineveh.

Link: https://bible-history.com/old-testament/the-flood