Length of the train is 170 meters and speed of the train is 63 km/hour. This train can pass a bridge in 30 seconds, then find the length of the bridge ?



Length of the train is 170 meters and speed of the train is 63 km/hour. This train can pass a bridge in 30 seconds, then find the length of the bridge ?

A. 355 mtrs

B. 325 mtrs

C. 365 mtrs

D. 312 mtrs

Answer : A. 355 mtrs


Explanation :

    Given speed = 63 km/hr = 63 × 5/18 = 35/2 m/s
    Let the length of the bridge = x mts
    Given time taken to cover the distance of (170 + x)mts is 30 sec.
    We know speed = distance/time
    35 / 2 = ( 170 + x ) / 30
    x = 355 mts.


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