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The length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is:
A. 200 mB. 225 m
C. 245 mD. 250 m

Answer: Option C
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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