A plane takes off from New York and travels a total distance of \(1440 \, KMs\) to its destination at an average speed of \(80 \, m/s.\) It then returns along the same route at twice its original speed. How much time does the trip take? (Note \(100 \, m = 1 \, KM\))

A. 0 hours 30 minutes
B. 2 hours 20 minutes
C. 5 hours
D. 7 hours 30 minutes
E. 10 hours

Answer: D

Source: Princeton Review