a train of 150m long travelled at a speed of 45km/h. the time taken by a train to cross a 500m long platfirm is
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45km/h = 12.5m/s
total length covered by train =150m+500m
= 650m
velocity=Dispacement/time
t=s/v
t=650/12.5
t= 52sec
therefore, time taken to cross the platform is 52 sec.
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