Question

Mary reached chool at 7:30 AM, and left for home at 12:45 PM. How long he tayed in the chool

Anwer with explanation

Answer 1

5 hours and 15 minutes.

Explanation:

7:30 - 8:00 is 30 minutes

8:00 - 12:00 is 4 hours

12:00 - 12:45 is 45 minutes

30 minutes plus 45 minutes is 1 hours and 15 minutes

4hours + 1 hour and 15 minutes is

5 hours and 15 minutes

or

5 1/4 hours

or

315 minutes.

I am not sure what form you want.