A train is 200m long and is moving with uniform velocity of 36 km/h the time it will take to cross a bridge of 1 km is
Correct answer: B. 120 sec
- A. 100 sec
- B. 120 sec
- C. 60 sec
- D. 50 sec
Explanation
Consider one point on the train as your frame of reference , so at any given point the train needs to travel 1200m ( 1km +200 m) to reach the other side of the bridge.And converting 36kmph into m/s gives us 10m/s. So by using time = displacement/velocity Time = 1200/10= 120 seconds
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