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A train 360 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 140 m long?
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A
40 sec
💡 Explanation:
To pass the bridge completely, the train must travel its own length plus the bridge length: 360 m + 140 m = 500 m. Speed of 45 km/hr = 45 × (5/18) = 12.5 m/s. Time = Distance / Speed = 500 m / 12.5 m/s = 40 seconds. Option B (42 sec) would require incorrect speed conversion.