A:Well it's elliptical,with a fourteen feet diamete B:Well ot's elliptical,with a fourteen foot diameter. C:Well it's elliptical,with fourteen foot diameter.

Question

whats one is correct....?

Answer 1

Don't forget a comma after the first word. "Well" seems to be an interjection here, and needs to be separated from the rest of the sentence. Otherwise, I agree with Justice R., and would make the answer:

"Well, it's elliptical, with a fourteen foot diameter."

Answer 2

There are two questions here: "fourteen feet" vs "fourteen foot," and "with" or "with a."

You might say "The diameter is fourteen feet." But when the measurement is being used as an adjective, as it is here, use "fourteen foot."

To figure out if it's "with" or "with a," let's remove that adjective. The sentence is now "Well it's elliptical, with diameter" or "Well it's elliptical, with a diameter." Diameter is a singular noun, so you need an article to connect it to "with."

The answer is "Well it's elliptical, with a fourteen foot diameter."