Question
6. (1)( because ) Total hours from 6: 19 am to ( 6: 19 mathrm{pm}=12 mathrm{h} )
and total hours from 6: 19 pm to
[
8: 19 mathrm{pm}=2 mathrm{h}
]
( therefore quad ) Total hours ( =(12+2) h=14 mathrm{h} )

6. The number of hours and minutes from 6:19 am to 8:19 pm on same day is (1) 14 h (2) 12 h (3) 11 h (4) 13 h
Solution
