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) (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
In 1 hour first car has traveled 45 miles.
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
time = d/r
t = 9 hours