26.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?
A. 120 m
B. 240 m
C. 300 m
D. None of these
Option : B
Speed =
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54 x
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5
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m/sec = 15 m/sec.
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18
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Length of the train = (15 x 20)m = 300 m.
Let the length of the platform be x metres.
⇒ x + 300 = 540⇒ x = 240 m.
