Answer:
540 people
Step-by-step explanation:
First, to get the minutes to hours you have to multiply 15 by 4 because there are 4 sets of 15 minutes in an hour. You get 180 people an hour.
Now you have to get to three hours so you have to multiply 180 by 3 so you get 540 people for 3 hours because when you multiply an hour by 3 you get three hours.
That's why the answer is 540 people in 3 hours.