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Two trains A and B is …

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Two trains A and B is of length of 100 metre are runing on paralel tracks one overtakes the other in 20 seconds and one cross crosises in 10 seconds calculates the velocity of each train.
  • 1 answers

Gaurav Seth 4 years ago

 Let u & v be the velocity of the two trains named A & B.

While overtaking the relative velocity of train A with respect to B = u - v.

While crossing, the relative velocity of train A with respect to B = u + v.

Total distance to be travelled by Train A while crossing = 100 + 100 = 200.

So,

20 = 200 ÷ u-v

=> u - v = 10....1)

Also,

10 = 200 ÷ u + v

=> u + v = 20.......2)

On solving the equation 1 & 2, we get;

u = 15 M/S of the train A / First Train.

v= 5 M/S of the train B / Second Train.

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