A 300 meter long train crosses a platform in 30 seconds while it crosses a signal pole in 18 seconds. What is the length of the platform? Options:	A) 287m	B) 278m	C) 350m	D) 200m	E) 282m
Speed = [300 / 18] m/sec = 50/3 m/sec.   Let the length of the platform be x meters.   Then, x + 300 / 30   = 50/3   3(x + 300)   = 1500 è x   = 200m.   Answer:200m
<result>D</result>
A 300 meter long train crosses a platform in 30 seconds while it crosses a signal pole in 18 seconds. What is the length of the platform?