7.5 hours.
7
From 8:30 AM to 4:30 PM is a total of 8 hours. Subtracting the 40-minute lunch break, the total working time is 7 hours and 20 minutes.
8.5 hours
Three hours
4
Eight hours.
7
8:30 to 5 is 8 and 1/2 hours no matter what you do for lunch.
7 hours
Three hours
3 hours.
6 hours.
7.5 hours
8.5 hours
8 hours 15mins.
7.5 hours
Four