The speed of of a train is 30 km/h. How long will it take to across a signal it its length is 25 m?
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Answer:
speed=30km/h
distance to cross the signal=length of the train
=25m
=0.025km
time taken=distance/speed
=0.025/30hour
=0.025/30*60*60s
=0.025*2*60
=3s
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