SOLUTION: A freight train leaves a station and travels due east at a speed of 60 mph. One hour later, a passenger train leaves the same station and travels due east on a parallel track at a

Question 658694: A freight train leaves a station and travels due east at a speed of 60 mph. One hour later, a passenger train leaves the same station and travels due east on a parallel track at a speed of 90 mph. How long will it take for the passenger train to overtake the freight train?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Do it like this one.
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A small plane leaves an airport and flies due south at 240km/h. A jet leaves the same airport 2 hours later and flies due south at 960km/h. How long does it take the jet to catch up to get to the small plane
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In 2 hours, the 1st plane is 480 km away (240*2)
The 2nd plane gains on the first at 720 km/hr (960 - 240)
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d = r*t
t = d/r
480/720 = 2/3 hours to catch up

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