a train is moving at speed of 25 kmph , another train moving the same direction at a speed of 49 kmph crossed a man in the first train in 10 sec ? wht is the length of the second train ?

2 Answers on this Question

1. relative velocity will be=49-25=24km/h
   then lenth of second train will be=
   24*(5/18)*10=66.66 mtr

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2. Relative velocity of trains = 49kmph -25 kmph = 24kmph
   =6.67m/s
   Time taken to cross the first train = 10 sec
   Length of the second train = Relative Velocity * Time taken
   to cross the first Train = 6.67 *10 = 66.7 metres

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