Question
Train A of length 150 m is running at 54 km/h and Train
B of length 200 m is running at 36 km/h in the opposite direction on parallel tracks. In how many seconds will they completely cross each other?Solution
ATQ,
Convert speeds to m/s: 54 km/h = 54 × (5/18) = 15 m/s 36 km/h = 36 × (5/18) = 10 m/s Relative speed (opposite direction) = 15 + 10 = 25 m/s Total distance to be covered = sum of lengths = 150 + 200 = 350 m Time = Distance / Speed = 350 / 25 = 14 seconds.
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