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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

8 s

B

4 sec

C

2 s

D

6 s

Text Solution

Verified by Experts

The correct Answer is:
B
`t=(1_(1)+1_(2))/(v_(r))=(1_(1)+1_(2))/(v_(1)+v_(2))`
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