A train travelling at 72 km per hour crosses a platform in 30 seconds and a man standing on the platform in 18 seconds what is the length of the platform in metres
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Speed of the train in metres/sec = 72000/3600 = 20
Distance travelled by train to cross the platform = 30 * 20 = 600
= Length of train + Length of platform
Distance travelled by train to cross the man
= 18 * 20 = 360 = Length of train
Length of platform = 600 - 360 = 240
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