It takes Joey the postman 1 hours to run a 2 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 6 mile/hour, what is the speed with which Joey returns?	Choose one:
A) 9  B) 12  C) 13  D) 14  E) 15
let his speed for one half of the journey be 3 miles an hour   let the other half be x miles an hour   now,   avg speed =5 mile an hour   2*2*x/3+x=6   4x=6x+18=&gt;2x=18   x=9   9
<result>A</result>
It takes Joey the postman 1 hours to run a 2 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 6 mile/hour, what is the speed with which Joey returns?