In Fall the pool is open from 10 am to 6 pm. How many hours is the pool open each day in the Fall?

• A. 6 hours
• B. 7 hours
• C. 8 hours
• D. 9 hours

Answer: (C)

Duration is found by counting the hours from opening to closing time. From 10 am to 12 pm is 2 hours, and from 12 pm to 6 pm is 6 hours. Add them together and you get 8 hours. Using 24-hour time, 18:00 minus 10:00 also equals 8 hours. So the pool is open 8 hours each day.