A man sitting in a train which is travelling at 50 kmph observes that a goods train, travelling in opposite direction, takes 9 seconds to pass him. If the goods train is 280 m long, find its speed.	Select the correct option
A) 62 kmph
B) 58 kmph
C) 52 kmph
D) 50 kmph
E) None of these
Relative speed = (280⁄9) m/sec = (280⁄9 × 18⁄5) kmph   = 112 kmph.   ∴ Speed of goods train = (112 – 50) kmph = 62 kmph.   62 kmphnswer 62 kmph
<result>A</result>
A man sitting in a train which is travelling at 50 kmph observes that a goods train, travelling in opposite direction, takes 9 seconds to pass him. If the goods train is 280 m long, find its speed.