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Let the length of train be 'l'.
Steps:
1) Find acceleration in terms of v1 and v2 by Newtons third equation of motion.
2) At mid point ,s = l/2 .
Then, find velocity at s = l/2 and substitute value of (al ) from previous equation.
Let the length of train be 'l'.
Steps:
1) Find acceleration in terms of v1 and v2 by Newtons third equation of motion.
2) At mid point ,s = l/2 .
Then, find velocity at s = l/2 and substitute value of (al ) from previous equation.
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