Length of a train is 170 meters and speed of train is 63 km / hr . This train can pass a bridge in 30 seconds , then find the length of the bridge.
A
355 m
B
325 m
C
365 m
D
312 m
Correct Answer: 355 m
Let, Length of bridge = x m ATQ, 63000/(60×80) = (170x + x)/30 Or, x + 170 = 105 × 5 Or, x = 525 - 170 Or, x = 355 so, Length of bridge 355 m ans: 355 m