A train traveling at 72 kmph crosses a platform in 30 seconds and a man standing on the platform in 20 seconds. What is the length of the platform in meters?  Choose the correct choice from the following options:
A) 200 meters
B) 360 meters
C) 420 meters
D) 600 meters
E) Cannot be determined
Speed of the train in metres/sec = 72000/3600= 
<gadget id="calculator">72000/3600</gadget>
<output>20</output>
20   Distance travelled by train to cross the platform= 30 * 20= 
<gadget id="calculator">30 * 20</gadget>
<output>600</output>
600= Length of train + Length of platform   Distance travelled by train to cross the man = 20 * 20= 
<gadget id="calculator">20 * 20</gadget>
<output>400</output>
400= Length of train   Length of platform = 600 - 400= 
<gadget id="calculator">600 - 400</gadget>
<output>200</output>
200   200 metersnswer: 200 meters
<result>A</result>
A train traveling at 72 kmph crosses a platform in 30 seconds and a man standing on the platform in 20 seconds. What is the length of the platform in meters?