A rhetorical answer is the instance where an answer is given to an unasked question but it is anticipated to be thought of by the majority of those involve in the conversation.
Bob: I have no idea what I should do for my birthday
Gilly: Party sounds good!
Tom: MANSION PARTY!!!
Theodore: China Town - and *no, I don't care to elaborate*.
Theodore has given an example of a rhetorical answer (highlighted by two asterix).
An answer spoken to produce an effect and not necessarily to answer the actual question. A rhetorical answer may possibly be given in response to a rhetorical question, as a sort of counter-attack in a rhetorical battle.
Do you know how many people will be in our philosophy class this year?
C'mon seriously, do you know what the main topic of our class will be?
Geez, how many times do you have to piss me off with rhetorical answers in one day?
Do you think I should wear the green dress or the red dress?
To be or not to be.
the obvious answer to a rhetorical question
guy #1- who was that pass to?
guy #3- the other team.
As opposed to a question not needing an answer, a rhetorical answer is an answer that should not questioned.
Joe: What's going on?
Abbie: My mum has gone into a coma, my dad has run off with his dentist and just failed all my exams.
Joe: ......that's a rhetorical answer isn't it?