Question
A train passes a station platform in 36 seconds and a man standing on the platform in 20 seconds. If the speed of the train is 54 km/hr, what is the length of the platform?
Answer: Option B
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Speed = \(\left(54\times\frac{5}{18}\right)m/sec = 15m/sec.\)
Length of the train = (15 x 20)m = 300 m.
Let the length of the platform be x metres.
Then, \(\frac{x+300}{36} = 15\)
x + 300 = 540
x = 240 m.
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