A 250m long train is moving at a constant speed of 72km/hr .how much time will it take to cross a bridge 150m long
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Answer:
7.5 SEC
Step-by-step explanation:
Speed of train is 72 km/hr
or 72*5/18 m/s = 20 m/s.
Train travelling distance = Distance of bridge + Length of train
150+250=400m
S=D/T
T=D/S = 400m / 20m/s = 400/20 sec = 20 sec
Time taken to cross the bridge is 20 sec.
Time taken to cover the bridge is 150/20 = 7.5 sec
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