An emergency vehicle travels 10 miles at a speed of 50 miles per hour. How fast must the vehicle travel on return trip if the round trip travel time is to be 20 minutes?  Choose the correct option
A) 75  B) 26  C) 20  D) 12  E) 91
Explanation:   Going trip time = t = dsds = 1050×601050×60 = 12 minutes.   Given total time = 20 minutes   Return trip time = Total time – Going trip time = 20 – 12 = 8 minutes = 860860 hours.   75s the distance is 10 miles during even return trip,   The return speed = dtdt = 1086010860 = 10×60810×608 = 75 mph   75nswer: 75
<result>A</result>
An emergency vehicle travels 10 miles at a speed of 50 miles per hour. How fast must the vehicle travel on return trip if the round trip travel time is to be 20 minutes?