Q. A train 200 m long running at 36 km/hr takes 55 seconds to cross a bridge. The length of the bridge is :
Answer: 350 m
Notes: Speed of train = 36 km/hr $latex = 36\times \frac{5}{18} = 10\ m/sec.&s=1$ If the length of the bridge be x metre, then $latex 10 = \frac{200+x}{55}&s=1$ $latex => 200+x = 550$ $latex => x = 550-200 = 350\ metre$ Hence option [C] is correct answer.

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