Tonya and Freda drive away from Norfolk on the same road in opposite directions. If Tonya is averaging 52 mph and Freda is averaging 65 mph, how long will it take for them to be 39 miles apart? Round your answer to the nearest minute.
52x + 65x = 39
X= 1/3 of an hour or 1/3 of 60 min = 20 minutes