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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?
Question 1:
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? A. 40 sec
Feedback Formula for converting from km/hr to m/s: X km/hr = ( x x 5/18) m/s
Therefore, Speed = (45 x 5/18 m/sec) = 25/2 m/sec.
Total distance to be covered = (360 + 140) m = 500 m.
Required time =500 x 2/25 sec = 40 sec.
Therefore, Speed = (45 x 5/18 m/sec) = 25/2 m/sec.
Total distance to be covered = (360 + 140) m = 500 m.
Required time =500 x 2/25 sec = 40 sec.
B. 42 sec
C. 45 sec
D. 48 sec
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