Question 488023
A freight train leaves the train station 2 hours before a passenger train. 
The two trains are traveling in the same direction on parallel tracks. 
If the rate of the passenger train is 20 mph faster than the frieght train, how fast is each train traveling if the passenger train passes the freight train in 3 hours.
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Freight train DATA:
time = 3+2 hrs ; rate = r mph ; distance = r(5) miles
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Passenger train DATA:
time = 3 hrs ; rate = r+20 mph ; distance = 3(r+20) miles
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Equation:
distance = distance 
5r = 3r+60
2r = 60
r = 30 mph (freight train rate)
r+20 = 50 mph (passenger train rate)
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Cheers,
Stan H.