Answer
Yes, the computed rates make sense.
Work Step by Step
Yes, the rates from parts (c) and (d) make sense since the two rates satisfy the conditions of the problem that they differ by $8.1\text{ ft/s}$.
The diagram also makes sense. Since the travel time from the garage to Terminal A and from Terminal A to Terminal B only differs by $15\text{ s}$, then the distance between these locations is almost the same. This is consistent with the given diagram.
