A train crosses a platform in 36 seconds and a man standing on the platform in 20 seconds.
Question 1:
A train crosses a 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
FeedbackSpeed = (54 * 5/18) m/sec = 15 m/sec. Length of the train = (15 x 20)m = 300 m. Let the length of the platform be x meters. Then, (x + 300)/36 = 15 ==> x + 300 = 540 ==> x = 240 m.
C. 300 m
D.None of these
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