How Much Water Was Needed for the Great Flood?

The waters prevailed above the mountains, covering them 15 cubits deep. To cover great ararat to a height of 23 feet, you need three times as much water as is currently in the earth's oceans. And to cover mount ras, to to and to cover mount everest to aheight of 15 cubits, or 23 feet. You'd need four point four times as much money for each mountain.