"He comes home in the afternoon."

Translation: वह दोपहर में घर आता है।

[tizerzert]

Why is vah dopher ghar mein atta hai incorrect?!

[vinay92]

दोपहर needs a postposition (either को or में). 'दोपहर में' = 'in the afternoon'. The postposition can be dropped for certain times of the day (like सुबह) but not for others (like दोपहर). It's just a quirk of the language.

वह दोपहर में घर में आता है is a grammatically correct sentence but you're emphasising that he is coming into the house by using घर में.

[noam403224]

Is दोपहर को correct? It was marked wrong in the sentence. What's difference using दोपहर को or दोपहर में?

[vinay92]

Yes. दोपहर को is correct. You can report if you see it again.

I don't think there is any difference in meaning between दोपहर को and दोपहर में. It's sort of like how we can use both 'at night' and 'in the night' in English