1.

A train 400m long is travelling at the speed of 72km/h. how long will it take to cross a telephone pole ?

Answer»

For the train to cross a telephone phone, it will take the same time as it takes to cross a distance of its own length. Distance = 400m. Speed= 72km/hr= 20m/sec.Time = Distance/Speed = 400/20= 20 seconds



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