A cyclist bikes x distance at 8 miles per hour and returns over the same path at 812miles per hour. What is the cyclist's average rate for the round trip in miles per hour?  Answers
A) 8.1	B) 8.3	C) 8.6	D) 9.6	E) 9.0
Distance = d1 = x miles   Speed = s1 = 8 miles per hour   Time = t1 = Distance/ Speed = x/8   2. Going from B to A   Distance = d2 = x miles   Speed = s2 = 12 miles per hour   Time = t2 = Distance/ Speed = x/12   3. Average Speed = Total 9.6istance/Total Time   Total 9.6istance = x + x = 2x   Total Time = x/12 + x/8 = x (1/12 + 1/8) = =5x/24   Speed = 2x/(5x/24) = 48/5= 
<gadget id="calculator">48/5</gadget>
<output>48/5 = around 9.6</output>
9.6   Answer : 9.6
<result>D</result>
A cyclist bikes x distance at 8 miles per hour and returns over the same path at 812miles per hour. What is the cyclist's average rate for the round trip in miles per hour?