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Two trains, each 50 m long, are travelli...

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

2s

B

4s

C

`2sqrt(3)s`

D

`4sqrt(3)s`

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • Two trains one 60 m long and other is 80 m long are travelling in opposite direction with velocity 10 m/s and 25 m/s . The time of crossing is :

    A
    `4` second
    B
    `5` second
    C
    `6` second
    D
    `3` second

  • The length of Lucknow mail is 120 m and that of Punjab mail is 80 m. These two trains are running in the opposite direction with velocities of 40 km/h and 50 km/h respectively. The time taken by them to cross each other is :

    A
    8 s
    B
    72 s
    C
    12.5 s
    D
    none of these

  • Two trains 121 m and 99 m in length are running in opposite directions with velocities 40 km h^(-1) and 32 km h^(-1) . In what time they will completely cross each other?

    A
    9 s
    B
    11 s
    C
    13 s
    D
    15 s