A train 150 m long passes a telegraphs post in 12 seconds. Find in what time, it will pass a bridge 250 m long?

32 sec
36 sec
25 sec
24 sec

Correct Answer: 32 sec

Explanation:

∵ Speed of the train = 150/12 m/sec.
Required time taken to cross the bridge = [(150 + 250) x (12/150)] = 32 sec.

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