A 300 m long train crosses a platform in 39 sec while it crosses a signal pole in 36 sec. What is the length of the platform?
Choose the correct answer.
A) 389 m B) 350 m C) 289 m D) 299 m E) 25 m
Speed = 300/36= 25/3 m/sec.   Let the length of the platform be x meters.   Then, (x + 300)/39 = 25/3   =&gt; x = 25 m.   Answer:25 m
<result>E</result>
A 300 m long train crosses a platform in 39 sec while it crosses a signal pole in 36 sec. What is the length of the platform?