Two trains 200 m and 150 m long are running on parallel rails at the rate of 40 kmph and 45 kmph respectively. In how much time will they cross each other, if they are running in the same direction ?

72 sec

132 sec

192 sec

252 sec

Relative Speed = (45 - 40 ) Kmph = 5 kmph =(5 x 5 / 18)m/sec = (25 / 18 ) m/sec Time taken = (350 x 18 / 25) sec = 252 sec.

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