A train traveling at 72 kmph crosses a platform in 34 seconds and a man standing on the platform in 18 seconds. What is the length of the platform in meters?
Select the correct option:  A) 240 meters  B) 320 meters  C) 420 meters  D) 600 meters  E) Cannot be determined
Speed of train = 72 * (5/18)= 
<gadget id="calculator">72 * (5/18)</gadget>
<output>20</output>
20 m/s   Lets consider the man as a stationery point on the platform.   Crossing the point gives us the length of the train.   Lt= 20 * 18= 
<gadget id="calculator">20 * 18</gadget>
<output>360</output>
360 m.   Crossing the platform gives us the length of trainlength of platform.   L(t+p)= 20 * 34= 
<gadget id="calculator">20 * 34</gadget>
<output>680</output>
680 m.   So, length of platform= 680 - 360= 
<gadget id="calculator">680 - 360</gadget>
<output>320</output>
320 m   IMO, Answer   320 meters
<result>B</result>
A train traveling at 72 kmph crosses a platform in 34 seconds and a man standing on the platform in 18 seconds. What is the length of the platform in meters?