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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?

Correct Answer: 40 sec

Explanation:

Formula for converting from km/hr to m/s:   X km/hr = X x 5 m/s.
18



Therefore, Speed = 45 x 5 ❩m/sec = 25 m/sec.
18 2


Total distance to be covered = (360 + 140) m = 500 m.



Formula for finding Time = Distance
Speed



∴ Required time = 500 x 2 ❩sec = 40 sec.
25
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