SOLUTION: Two cars start at the same place at the same time and travel in opposite directions at average speeds of 60 mph and 72 mph. How many hours will it take before the cars are 198 mil

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Question 1115121: Two cars start at the same place at the same time and travel in opposite directions at average speeds of 60 mph and 72 mph. How many hours will it take before the cars are 198 miles apart?

Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
.
Distance + distance = whole distance


60t      + 72t      = 198    


132t = 198  ====>  t = 198%2F132 = 3%2F2 of an hour = 1 hour and 30 minutes.