An express train travelling at '400" "m' hr overtakes a goods trains, twice as long and going in same direction at '40" "kmhr' on a parallel track in 54 seconds. How long will the express train take to cross a station '80kmhr' long? (in sec)
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an experimental travelling at 400 m ht over takes a good trains ,twice as long and going in same direction ⬇️⬆️ at 40km/hour
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