Question

250m long train passes a 350 m long tunnel in 30 seconds.What time will it take to pass a bridge 650m long

Answer 1

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Here, the 250m long train passes a 350m long tunnel in 30 seconds.
Thus, total distance travelled = 350 + 250 = 600m.
And total time taken = 30 seconds.

Thus, speed of the train = 600/30 m/s = 20m/s.

Thus, speed of the train was 20 m/s.

Now, the time it will take to pass a 650m long bridge = (650+250)/20 = 900/20 = 45s.

Hence, the train will take 45 seconds to cross a 650m long bridge.

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Answer 2

Answer:

ans is 45 second

Step-by-step explanation:

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