six feet deep

[Shie0605]

six feet deep
60 miles an hour

Six feet, 60 miles and an hour are all nouns.
What's are their grammatical property?
Thanks.

 

[Rover_KE]

six feet deep
60 miles an hour

Six feet, 60 miles and an hour are all nouns.

No, they aren't; 'feet', 'miles' and 'hour' are all nouns.

What's are What is their grammatical property?

If you want to know the meanings of the phrases, please ask about them in separate theads and in full sentences.