Tours of the art museum are offered every 1/3 hr from 10:00 A. M. until closing at 4:00 P. M. How many tours are offered each day?

18 tours are offered

Step-by-step explanation:

So 1/3 of a hour is 20 mins, so every 20 mins a tour is offered so we know 1 hour equals to 3 tours offered so

10:00 to 11:00 is 3, 11:00 to 12:00 is 3, 12:00 to 1:00 is 3, 1:00 to 2:00 is 3, 2:00 to 3:00 is 3, 3:00 to 4:00 is 3.

6 hours times 3 equals, 18 tours are offered

Answer: 3 Each hour * (difference in 10 am and 4 pm = 5) = 15.