A 300 m long train crosses a platform in 39 sec while it crosses a signal pole in 18 sec. What is the length of the platform?
Pick one:	A) 200	B) 300	C) 350	D) 400	E) 450
Speed = 300/18 = 50/3   length of the platform x meters   (x+300)/39 = 50/3   3x+900 = 1950 ==&gt; x = 350 m   ANSWER 350
<result>C</result>
A 300 m long train crosses a platform in 39 sec while it crosses a signal pole in 18 sec. What is the length of the platform?