It takes Joey the postman 1 hours to run a 6 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 8 mile/hour, what is the speed with which Joey returns?	Choose the correct answer:	A) 11	B) 12	C) 13	D) 14	E) 15
let his speed for one half of the journey be 6 miles an hour   let the other half be x miles an hour   now,   avg speed =8 mile an hour   2*6*x/6+x=8   12x=8x+48=&gt;x=12   12
<result>B</result>
It takes Joey the postman 1 hours to run a 6 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 8 mile/hour, what is the speed with which Joey returns?