1.

Two trains, each `50 m` long, are travelling in opposite directions with velocities `10 ms^-1 and 15 ms^-1`. The time of their crossing each other is.A. 8 sB. 4 secC. 2 sD. 6 s

Answer» Correct Answer - B
`t=(1_(1)+1_(2))/(v_(r))=(1_(1)+1_(2))/(v_(1)+v_(2))`


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