Answer:
The group spent 1 hour and 45 minutes inside the Museum
Explanation:
Here, given the time in which a group of people entered into a company and that time they got out, we want to know the number of minutes they spent inside the museum
Mathematically that would be;
5:15 - 3:30
3:30 - 4:30 is an hour, 4:30 to 5:30 is another one hour making 2, but only 15 minutes was spent before 5:30
So the time spent will be 2 hours - 15 minutes p 1 hour 45 minutes