SOLUTION: one family drove at 6mph and another family drove at 14 mph. when withh the second family be 20 miles ahead of the first?

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Question 310790: one family drove at 6mph and another family drove at 14 mph. when withh the second family be 20 miles ahead of the first?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
ASSUMING THEY STARTED @ THE SAME TIME FROM THE SAME PLACE & THEY ARE ON THE SAME ROAD, THEN:
D=RT
20=(14-6)T
20=8T
T=20/8
T=2.5 HOURS THEY WILL BE 20 MILES APART.