A train of length 420m takes 33.6secondsto cross a 350m long tunnel.Find the speed of the train in km/h
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Answer:
to cross the tunnel,the train covered the distance
(350+420)m=770 m=.77km
the train takes time 33.6 sec
=33.6/3600 hour
=112/12000 hour
=28/3000hour
speed if the train is distance/time
=.77/28/3000 km/hour
=77×3000/28×100km/hour
=11×30/4km/hour
=165/2km/hour
=82.5km/hour
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Step-by-step explanation:
average speed= total distance/ total time
total distance= 770m
total time=33.6s
speed= 770=33.6
=7700-336
= 21.92 m/s. approximately.
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