A 300 meter long train crosses a platform in 51 seconds while it crosses a signal pole in 18 seconds. What is the length of the platform?  Pick one
A) 550
B) 289
C) 350
D) 882
E) 281
Speed = [300 / 18] m/sec = 50/3 m/sec.   Let the length of the platform be x meters.   Then, x + 300 / 51 = 50/3   3(x + 300) = 2550 è x = 550m.   550nswer: 550
<result>A</result>
A 300 meter long train crosses a platform in 51 seconds while it crosses a signal pole in 18 seconds. What is the length of the platform?