SOLUTION: Average speed of Car 1 = 45 mph. Average speed of Car 2 = 65 mph. Time elapsed between start of Car 1 and start of Car 2 = 18 minutes. How long before Car 2 overtakes Car 1?

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Question 880276: Average speed of Car 1 = 45 mph.
Average speed of Car 2 = 65 mph.
Time elapsed between start of Car 1 and start of Car 2 = 18 minutes.
How long before Car 2 overtakes Car 1?
Answer by josgarithmetic(39615) About Me  (Show Source):
You can put this solution on YOUR website!
18 minutes is 18%2F60=3%2F10 hour.

Basic rule is RT=D rate time distance.

________________speed________time_______distance
Car 1___________45___________t+3/10_____d=45(t+3/10)
Car 2___________65___________t__________d=65t

When both distances are equal, they each are d.
highlight_green%2845%28t%2B3%2F10%29=65t%29.
Solve for t.