a platform is 400 m long. what is the length of a train which can cross the platform at a speed of 54 km/ hr in 55 second
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Step-by-step explanation:
Speed of train= 54 km/h
or
18
54×5
=15m/s
Distance covered=Length of bridge (l)+Length of train
=l+100
Time = 20 second
15
l+100
=20
l=200 m
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