Translation:Are your feet tired?
I don't think it's common to say "my feet are tired" in English. I reported my answer to be acceptable as "Are your feet sore?"
I found the sentence "My legs are tired." in this dictionary. https://dictionary.cambridge.org/dictionary/english/tired
Without more context, it is impossible to tell if this question is referring to one foot or two.
脚 (jiǎo) is definitely foot, you would call it a leg only when refering to animals. 腿 (tuǐ) is used for human legs. 脚 and 足 both mean foot, but I have no idea about the difference between them.
We almost never say "Are your feet tired?" instead of "Are your legs tired?" as I have never heard any ask "你的腿累吗" instead of "你的脚累吗", so we should not be using word for word translation, we should be using the whole sentence.