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?

120 m
240 m
300 m
None of these

Correct Answer: 240 m

Explanation:

Speed =	❨	54 x	5	❩m/sec = 15 m/sec.
			18

Length of the train = (15 x 20)m = 300 m.

Let the length of the platform be x metres.

Then,	x + 300	= 15
	36

⟹ x + 300 = 540

⟹ x = 240 m.

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