Nile and Bob both were traveling were 2 hours
Solution:
The formula for time is given by:

Given that,
Niles’ sailboat traveled 16 miles at a speed of 8 mph
Distance = 16 miles
Speed = 8 mph
Therefore, time taken is given as:

Thus, Nile takes 2 hours to travel
Bob’s motorboat traveled 26 miles at a speed of 13 mph
Distance = 26 miles
Speed = 13 mph
Therefore, time taken is given as:

Thus, Bob takes 2 hours to travel