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A plane takes off from New York and travels a total distance of \(1440 \, KMs\) to its destination at an average speed

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A plane takes off from New York and travels a total distance of \(1440 \, KMs\) to its destination at an average speed

by Vincen » Wed Aug 26, 2020 2:21 am
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
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