Q: 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 takes? (Note 1000 m = 1 KM)
(Target Audience: GMAT)
A. 0 hours 30 minutes
B. 2 hours 20 minutes
C. 5 hours
D. 7 hours 30 minutes
E. 10 hours
Answer: Option D