SOLUTION: the Beta train is going 40km/h slower than the Lightning train, the lightning train makes the 850km journey in 3 hours less time. what is the speed of both trains?

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Question 286295: the Beta train is going 40km/h slower than the Lightning train, the lightning train makes the 850km journey in 3 hours less time. what is the speed of both trains?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
r*t=d
B=L-40,
850=(t-3)*L,
850=t*B
B~~88.3205, L~~128.321, t~~9.62404