Lexy walks 5 miles from point A to point M in one hour, then bicycles back to point A along the same route at 15 miles per hour. Ben makes the same round trip, but does so at half of Lexy’s average speed. How many minutes does Ben spend on his round trip?  Options:	A) 40	B) 80	C) 120	D) 160	E) 180
Lexy walks 5 miles from point A to point M in one hour, then bicycles back to point A along the same route at 15 miles per hour. Ben makes the same round trip, but does so at half of Lexy’s average speed. How many minutes does Ben spend on his round trip?   Average speed = total distance/total time   We know the total distance is 5+5 (going from A to M then from M to A)   Time = distance/speed   Time = 5/15   Time = 1/3 hour   Average speed = (10)/(1hr + 1/3hr)   Average speed (lexi) = 10 / 1.33   Therefore, if Ben's average speed is 1/2 of lexi's then his speed = 10/2.66.   This means it took him 2.66 hours to cover the same 10 miles Lexi did. 2.66 hours = roughly 160 minutes.   Answer: D). 160
<result>D</result>
Lexy walks 5 miles from point A to point M in one hour, then bicycles back to point A along the same route at 15 miles per hour. Ben makes the same round trip, but does so at half of Lexy’s average speed. How many minutes does Ben spend on his round trip?