A train 180 meters long passes a pole in 12 seconds. How long will it take to pass a platform that is 420 meters long?

Question: A train 180 meters long passes a pole in 12 seconds. How long will it take to pass a platform that is 420 meters long? Solution:Train's speed = Distance/Time= 180/12 = 15 m/s Total distance to pass the platform,= Length of train + Length of platform = 180 m + 420 m= 600 m ∴ Required time = Distance/Speed= 600/15= 40 seconds ∴ The train will take 40 seconds to pass platform.