Two trains of length 200 m and 300 m pass each other with constant and same speeds on parallel tracks in opposite directions. The drivers and guards are at the extremities of the trains. The time gap between the drivers passing each other and first driver-guard pair passing each other is 30 s. How much later will the other driver-guard pair pass by?
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Answer: Almost 14 Seconds
Explanation: Length of 1st train= 200m
Speed of 1st train= 45 km/h
=45×5/18= 12.5 m/s
Length of 2nd train= 250 m
Speed of 2nd train= 50km/h=13.88 m/s=14 m/s
Here question Saying time taken to pass Both trains.Means train has now meet and We have to find after how many seconds both Train will be on passing each.
Then total Length= 200+250=450 m
Total speed= 12.5+14=26.5 m/s
Time= Length/speed
Time= 450/26.5
Time= 13.98 second
Almost 14 seconds
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