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```        Two trains(both are 400m in lenght) are travelling on two parallel tracks with the same speed 72kmph.train A is ahead of train B. Now train B driver decides to overtake train A and accelarates at 1m/s2
and manages to overtake in 50 sec.Now calculate the initial seperation between the trains before the train B's accelaration?
```
7 years ago

147 Points
```										Dear karthik
let the initial seperation = x
In train A  frame of reference .velocity of train A is zero.initia velocity of train  B is zero.
to overtake train A ,train A has to cover L+800  distance.
so
S =1/2at2
L+800 =1/2 *1 *  (50)2
L=450 m
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```
7 years ago
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