A train passes a station platform in 24 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?
Choose the correct answer: A) 123 B) 60 C) 240 D) 157 E) 198
Speed = [54 * 5/18] m/sec = 15 m/sec.   Length of the train = (15 * 20)= 
<gadget id="calculator">(15 * 20)</gadget>
<output>300</output>
300 m.   Let the length of the platform be x meters.   Then, (x + 300) / 24= 15   x + 300 = 360   x = 60 m.   Answer: 60
<result>B</result>
A train passes a station platform in 24 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?