Question

Raj comes to school 20 min. after 7 o'clock . he left the school at 30 min. past twelve. how long was he at school.

Answer 1

He arrives =7:20 AM
He departures at =11:30 AM
Total time he studied in school =11:30-7:20 =4 hours 10 minutes or 250 minutes
I hope this is The right answer

Answer 2

he was in school for 4 hours ten minutes