Question

Maggie took a walk. She left at 10:30 A.M. and got home at 1:45 P.M. How long was she gone?

Answer 1

The answer is 3 hours and 15 minutes:
 lets put it like this :
HOURS :
10:30  so 10:30 to eleven is really 30 min.(cause we want to count hours first)

11:00   so we start by here
11:30
12:00
(this whole thing is one hour 11:00 to 12:00 is one hour ) 1h  

12:00
12:30
  1:00
  (this whole thing is one hour) 1h
here we stop ,now so far we have 2h

MINUTES:
Now we still have that 30 minutes from 10:30 to 11:00 and that 45 min from 1:45 .so we add them up 30min + 45min =75 min =1h and 15 min

so now add all of them together  2h + 1h +15 min = 3h and 15 min
  
 

Answer 2

Convert 1:45 pm to 24-hour system = 13.45

Answer is 13.45 - 10.30  = 3 hours 15 minutes