Two trains cross each other in opposite ...

Two trains cross each other in opposite direction with velocity 72 km/h. The magnitude of relative velocity of one train with respect to the other is ......

144 km/h

0 km/h

1 km/h

72 km/h

Text Solution

Verified by Experts

The correct Answer is:

`v _(12) =v_(1) - v _(2)`
`= 72 - (-72)=144 km//h`

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