The length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is:

200 m
225 m
245 m
250 m

Correct Answer: 245 m

Explanation:

Speed =	❨	45 x	5	❩m/sec	=	❨	25	❩m/sec.
			18				2

Time = 30 sec.

Let the length of bridge be x metres.

Then,	130 + x	=	25
	30		2

⟹ 2(130 + x) = 750

⟹ x = 245 m.

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