Answer: 156 hours
Explanation:
Crew One worked 10-, 9-, 11-, 12-, and 9-hours for the week. The total hours worked by Crew One will be:
= 10 + 9 + 11 + 12 + 9
= 51 hours.
Crew Two worked 9, 12, 12, 9 and 9 hours. The total hours worked by Crew Two for the week will be:
= 9 + 12 + 12 + 9 + 9
= 51 hours
Crew Three worked 12-, 12-, 10-, 9-, and 11-hour daily. The total hours worked by Crew Three for the week will be:
= 12 + 12 + 10 + 9 + 11
= 54 hours
The total hours worked by the three crews for the week will be:
= 51 hours + 51 hours + 54 hours
= 156 hours
