1] A man sitting in a train which is traveling at 50 kmph observes that a goods train, traveling in opposite direction, takes 9 seconds to pass him. If the goods train is 150 m long, find its speed.
a] 10 kmph b]20 kmph c]30 kmph d]40kmph
a] 10 kmph b]20 kmph c]30 kmph d]40kmph
Sol. Relative speed = (150/9) m/sec =(150/ 9 x 18/5) kmph = 60 kmph.
:. Speed of goods train = (60 - 50) kmph = 10 kmph.
2] A man sitting in a train which is traveling at 50 kmph observes that a goods train, traveling in opposite direction, takes 9 seconds to pass him. If the goods train is 280 m long, find its speed.
a] 12 kmph b]22 kmph c]42 kmph d]62 kmph
:. Speed of goods train = (60 - 50) kmph = 10 kmph.
2] A man sitting in a train which is traveling at 50 kmph observes that a goods train, traveling in opposite direction, takes 9 seconds to pass him. If the goods train is 280 m long, find its speed.
a] 12 kmph b]22 kmph c]42 kmph d]62 kmph
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