A) 5s
B) 10s
C) 12s
D) 15s
Correct Answer: A
Solution :
Total distance coverd by second train in crossing the first train = 250 m Velocity of second train w.r.t first train \[=20\,m/s+30m/s\] = 50 m/s \[\therefore \] Time \[=\frac{Distance}{Velocity}\] \[=\frac{250}{50}=5\,\,s\]You need to login to perform this action.
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