Question : A train 200 metres long, is running at a speed of 20 metres per second. In how much time (in seconds) it will cross a bridge of length 400 metres?
Option 1: 20
Option 2: 25
Option 3: 30
Option 4: 60
Correct Answer: 30
Solution :
We have,
Distance to cover = the length of the train + length of the bridge = 400 + 200 = 600 metres
Speed = 20 metres per second
$\text{Time}=\frac{\text{Distance}}{{\text{Speed}}}=\frac{600}{20}$ = 30 seconds
Hence, the correct answer is 30 seconds.
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