The length of bridge, which a train 130 metres long and travelling at 45km/hr can cross in 30 seconds is?
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Step-by-step explanation:
Speed of the train = 45 km/hr = 45 x (5/18) = 25/2 m/sec
Let the length of the bridge be L metres
∴ (L + 130) / (25/2) = 30
⇒ L + 130 = 15 x 25
L = 375 - 130 = 245 metres
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