<PRE><B>Question 377501</B>
The train left at 9 am with 50 mph.Let t be the time and the distance train travelled in t hours = 50 t
The plane started after 2 hours that is at 11 am
so the distance covered by the plane in t-2 hours is
175(t-2)
To overtake the train the plane has to meet it first
so it means...
50 t = 175(t-2)
50t = 175t-350
175t-50t= 350
125 t = 350
t = 350/125=2.8
so after 2.8 hours the train and  the plane are at the same place 
That is at 11.48 AM they are at the same place.So after 11.48 AM  the plane overtakes the train.

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