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A 120 m long train is moving in a direct...

A 120 m long train is moving in a direction with speed 20 m/s . A traing B moving with 30 m/s in the opposite direction and 130 m long crosses the first train in a time

A

`6s`

B

`36s`

C

`38s`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
D
`v_(A//B)=20+30=50 m//s`
`t=(l_(A)+l_(B))/50=(120+130)/50 =5s`
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Knowledge Check

  • A 120 m long train is moving in a direction with a speed of 20ms^(-1) . Another train (130m long) moving with 30ms^(-1) in the opposite directon crosses the first train in a time

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