Question : A train, 200 metres long, is running at a speed of 54 km/h. The time in seconds that will be taken by the train to cross a 175 metres long bridge is:
Option 1: 12.5
Option 2: 20
Option 3: 25
Option 4: 10
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Correct Answer: 25
Solution : Given: Length of train = 200 m and length of bridge = 175 m. Its speed is 54 km/h. To convert km/h into m/s, multiply with $\frac{5}{18}$, we get $54 \times\frac{5}{18}=15$ m/s We know that $\text{time}=\frac{\text{Distance}}{\text{Speed}}=\frac{200+175}{15} = \frac{375}{15}=$ 25 seconds Hence, the correct answer is 25.
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Question : The time taken for a train of length 110 metres running at a speed of 72 km/h to cross a bridge of length 132 metres is:
Option 1: 9.8 seconds
Option 2: 12.1 seconds
Option 3: 12.42 seconds
Option 4: 14.3 seconds
Question : At what time will a 100 metres long train running at a speed of 50 km/h cross a pillar?
Option 1: 7 seconds
Option 2: 72 seconds
Option 3: 7.2 seconds
Option 4: 70 seconds
Question : A 110 metres long train is running at a speed of 60 km/h. In what time will it pass a man who is running at 6 km/h in the direction opposite to that in which the train is going?
Option 1: 5 seconds
Option 2: 6 seconds
Option 3: 7 seconds
Option 4: 10 seconds
Question : A 100 metres long train is running at a speed of 120 km/h. The time taken to pass a person standing near the line is:
Option 1: 1 second
Option 2: 3 seconds
Option 3: 5 seconds
Option 4: 7 seconds
Question : 150 metres long train passes a telegraphic post in 12 seconds. Find the speed of the train (in km/h).
Option 1: 50
Option 2: 12.5
Option 4: 45
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