A 300 meter long train crosses a platform in 39 seconds while it crosses a signal pole in 18 seconds. What is the length of the platform? Choose the correct choice from the following answers.
A) 287m B) 278m C) 350m D) 228m E) 282m
Speed = [300 / 18] m/sec = 50/3 m/sec.   Let the length of the platform be x meters.   Then, x + 300 / 39   = 50/3   3(x + 300)   = 1950 è x   = 350m.   Answer:350m
<result>C</result>
A 300 meter long train crosses a platform in 39 seconds while it crosses a signal pole in 18 seconds. What is the length of the platform?