"is this letter official?" i think is in the same vein
Would that not be 'apakah surat ini resmi?'
Yes, you are right.
Apakah ini surat resmi ? = Is this an offical letter ?
Apakah surat ini resmi ? = Is this letter official ?
thank you for this explanation it makes perfect sense terima Kasi
Since resmi can mean official or formal, "Is this a formal letter?" should also be an acceptable answer.
I agree. I reported it.