A train 210m long took 12 sec.. To pass a 90m tunnel . Find the speed of train
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in 12 sec train goes =210+90=300m
1 min , train goes= 300×5=1500 m
1 hr, train goes =1.5×60 km=90km
so the speed of the train is=90km/hr
1 min , train goes= 300×5=1500 m
1 hr, train goes =1.5×60 km=90km
so the speed of the train is=90km/hr
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