1. The fired chicken was delivered in 30 minutes.
2. The fired chicken was delivered after 30 minutes.
3. The fired chicken was delivered within 30 minutes.
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Are they all grammatical? Does #1 mean #2 or #3? Which one is commonly used?
1and 3 mean the same thing: in fewer than 30 minutes.
2 means delivery took longer than 30 minutes.