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Answer : 1 355 mts Explanation : Answer: A) 355 mts Explanation: Given speed = 63 km/hr = 63×518=352 m/sLet the length of the bridge = x mtsGiven time taken to cover the distance of (170 x)mts is 30 sec.We know speed = distancetimem/s⇒352=170 x30 --