SOLUTION: A car leaves Columbia at 1:00pm traveling at 45mph. A second car leaves Columbia at 2:00 traveling at 50mph. How long will it take the second car to overtake the first car?

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Question 375156: A car leaves Columbia at 1:00pm traveling at 45mph. A second car leaves Columbia at 2:00 traveling at 50mph. How long will it take the second car to overtake the first car?
Answer by mananth(12270) About Me  (Show Source):
You can put this solution on YOUR website!
Car leaves Columbia at 1.00 pm 45 mph
second car leaves at 2.00pm 50 mph
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In 1 hour first car has traveled 45 miles.
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They are travelling in the same direction so effective speed = 50-45 = 5 mph.
every hour second car makes up 5 miles.
distance is 45 miles
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time = d/r
t=45/5
t = 9 hours
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m.ananth@hotmail.ca