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A train A which is 120 m long is running...

A train A which is 120 m long is running with velocity 20 m/s while train B which is 130 m long is running in opposite direction with velocity 30 m/s. What is the time taken by train B to cross the train A?

A

6s

B

36 s

C

38 s

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
D
Total distance `=130+120=250`m
Relative velocity`=30-(-20)=50(m)/(s)`
Hence `t=(250)/(50)=5s`
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