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Question

A 50m long train passes over a bridge at a speed of 30km/h, if it takes 36 secs cross the bridge, what is the length of the bridge?


Solution

Let the length of bridge be x m
length of train = 50m
distance covered by train = (50+x) m 
speed = 30km/h => 30×5/18 => 25/3 m/s
time taken = 36 s

we know that ,
speed=distance/time 
distance = Speed × time 
50+x = 25/3×36
x = 300-50 => 250m

 

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