A train, 800 meters long is running with a speed of 78 km/hr. It crosses a tunnel in 1 minute. What is the length of the tunnel? A. 555 meter B. 458 meter C. 650 meter D. 500 meter Answer Workspace Report Discuss Answer with explanation Answer: Option D Explanation Let length of tunnel is x meter Distance = 800+x meter Time = 1 minute = 60 seconds Speed = 78 km/hr = 78*5/18 m/s = 65/3 m/s Distance = Speed*Time So the length of the tunnel is 500 meters. Workspace
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