A goods train completely crosses a 120m long bridge with uniform speed v in t seconds. Then it will cross 240m long bridge with uniform speed 2v in. : a)t secs b)2t secs c)less than t secs d)more than t secs.
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As per the statement A goods train completely crosses a 120m long bridge with uniform speed v in t seconds. t = 120/v Now distance is 240 m and speed = 2v Therefore time = 240/2v = 120/v = t secs Thanks, Ashish
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