Answers

2015-01-21T21:16:19+05:30

Relative speed of the two trains will be 60+40 = 100km/hr = 100*5/18 m/s = 250/9m/s

Distance covered by the trains in crossing each other= 140+160=300 m

Therefore time required = Distance/Speed = 300/250/9 =300*9/250 = 54/5 = 10.8sec

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