a train 300 m long travel at a a 85 km per hour find the time taken by it to cross a signal
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length of train =300
- it is traveling with a speed of 85km
- here length is in meters ond speed is in km/hr
- so we wont to change km/hr into m/sec
- so we multiplay with 18/5
- that is 85*5/18we know
- time =distanc/speed
- time =300/85*5/18
- time=(300*18)/85*5
- time =12sec
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