Both are correct. Hopefully I can break it down for you. 哪儿 ＝ Na (er) (sounds like Naar)= Where. This is what you are hearing in your text, presumably with a BeiJing or northern accent. 哪里 = Na Li = (sounds like Gnarly) =Where. This is what you are referring to in PinYin of the word translated. The BeiJing dialect from which Mandarin is based has an accent often referred to as 儿化 = Er hua. This is because the use of the 儿 at the end of many words. Basically both are correct however 哪儿 is less formal than 哪里 and if you are referring to an object that may exist inside something then 哪里 would be more accurate. Hope I have helped to give guidance. Just remember that as in English, there is always more then one way to express something and both can be correct.

"where", commonly 哪里="nǎlǐ " is formal saying. 哪儿=“nǎ er”is very oral saying. and in the south of China,they pronunce"nǎlǐ "or "na", in the north,pronunce"na er"

Where in Mandarin is 哪里（nǎlǐ）.But you refer to the prounaciation like: Naar (English, not pinyin) ,I think that 's 哪儿（nǎer)or 哪啊（nǎa)They are both　ｏｋ．A way of oral language.

the pronunciation of where in mandarine is nali/na（哪里、哪）.you speak correctly.. there is another expression for where is naar as you checked in google..these r two words..na er（哪儿）。。people like adding er when they speak ....so hope you can understand

hi, ajuzadolfo,nǎlǐ is right.just now i also check "where"translation from google.it's wrong,it translates "where"to"qizhong",it's wrong. but in oral,people always say:na er.