A train passes a station platform in 18 seconds and a man standing on the platform in 12 seconds. If the speed of the train is 54 km/hr, what is the length of the platform?
Choose the correct choice from the following options
A) 100 B) 150 C) 96 D) 88 E) 90
Speed = [54 * 5/18] m/sec = 15 m/sec.   Length of the train = (15 * 12)= 
<gadget id="calculator">(15 * 12)</gadget>
<output>180</output>
180 m.   Let the length of the platform be x meters.   Then, x + 180/ 18= 15   x + 180 = 270   x = 90 m.   Answer:90
<result>E</result>
A train passes a station platform in 18 seconds and a man standing on the platform in 12 seconds. If the speed of the train is 54 km/hr, what is the length of the platform?