Given number is 6294.
So, the unit place digit of 6294 is 4.
[If the digit at one's place is less than 5, replace one's digit by 0, and keep the other digits as they are. Also , if the digit at one's place is 5 or more than 5 , increase tens digit by 1, and replace one's digit by 0.]
∵ Unit place digit is 4<5.
Hence, round off the given number 6294 is 6290.