please give me this answers
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the speed of train
=120KMPH
=100/3 MPS
now distance travelled by train in 90 sec
=100/3×90
=3000m
Now
distance req.= distance travelled-lenght of train
=3000-1200
=1800 m
hope this helps!
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speed=120km/HR
time =90seconds=90/360hr=1/4hr
distance=speed×time
=120km×1/4
=30km
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