The boat travel 23 mph and an additional 2 mph so (23 + 2). Next problem wants to know how far will the boat travel in three hours. We can model this and solve using the following equation
d = rt
d = distance
r = rate
t = time
We are trying to find the distance
r = (23 + 2)
t = 3
d = 3(23 + 2)
d = 75
The boat will travel 75 miles in 3 hours