A 300 meter long train crosses a platform in 54 seconds while it crosses a signal pole in 18 seconds. What is the length of the platform?  Choose the correct choice from the following choices:	A) 99	B) 289	C) 350	D) 882	E) 600

Rationale: speed = [ 300 / 18 ] m / sec = 50 / 3 m / sec . let the length of the platform be x meters . then , x + 300 / 54 = 50 / 3 3 ( x + 300 ) = 2700 è x = 350 m . answer : e
Answer: E