It takes Joey the postman \(1\) hour to run \(3\) mile long route every day. He delivers packages and then returns to

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A

B

C

D

E

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It takes Joey the postman \(1\) hour to run \(3\) mile long route every day. He delivers packages and then returns to the post office along the same path. If the average speed of the round trip is \(5\) mile/hour, what is the speed with which Joey returns?

A. \(11\)
B. \(12\)
C. \(13\)
D. \(14\)
E. \(15\)

The OA is E