Question 1021381
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Hi  
Trains will travel the same amount of time before they meet.  t = D/r
{{{D / 45 = (325-D)/85}}}
85D = 45*325 - 45D
130D= 45*325
D = 14625/40 = 112.5
T = 112.5/45 = 2.5 Hr

Checking
2.5hr = (325-112.5)mi/85mph checks!