SOLUTION: Two cars drive toward each other, one driving at 60 mph and one driving at 30mph, after 10 minutes they pass, how far apart were they when they started? Is the answer 9 miles apart

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Question 284326: Two cars drive toward each other, one driving at 60 mph and one driving at 30mph, after 10 minutes they pass, how far apart were they when they started? Is the answer 9 miles apart?
Answer by Alan3354(69443) About Me  (Show Source):
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Two cars drive toward each other, one driving at 60 mph and one driving at 30mph, after 10 minutes they pass, how far apart were they when they started? Is the answer 9 miles apart?
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When going in opposite directions their speeds are added.
60 + 30 = 90 mph
10 mins = 1/6 hour
90 miles/hour * (1/6 hour) = 15 miles