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?	Choices:	A) 120 m	B) 240 m	C) 300 m	D) 350 m	E) None of these
Explanation:   Speed = (54 x5/18)m/sec = 15 m/sec.   Length of the train = (15 x 20)m = 300 m.   Let the length of the platform be x metres.   Then,	x + 300/36 =15   x + 300 = 540   x = 240 m.   ANSWER IS 240 m
<result>B</result>
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?