Time Context:
Word Use Example Meaning in general time frame I will come in 10 minutes. After 10 Minutes within deadline/limit I will come within 10 minutes. Any time before 10 minutes.
So:
In = after a certain time
Within = before that time ends
- Space / Location Context:
Word Use Example Meaning
In general position The keys are in the drawer.
inside
Within boundaries, limits He lives within city limits. Inside boundaries or rules
So:
In = general “inside”
Within = more formal, often with a boundary or limit
- Abstract / Rule-based:
Word Use Example Meaning
In simple presence She is in love. Experiencing love
Within inside boundaries or limits Stay within the law. Don’t break the law
More general More specific, implies a limit
Common in daily use Slightly more formal
“In 5 days” = after 5 days “Within 5 days” = before 5 days end.
English 
Hindi