To cover Everest @ 19357 cubits with rainwater would require a rainfall rate of about 20 cubits/hour, unless of course, one doesn't trust the laws of physics continue to perform as God established them from the beginning.
ummm...uhhhh
I know!
maybe mt everest didnt exist during the flood and was magicked there after the flood to trick scientists.
That is an interesting figure. Of course, to apply this to the Great Flood one would have to assume Mt. Everest was there to begin with.
Reminds of the Cosby Noah sketch:
What's a cubit?