A train 800 meters long is running at a speed of 78 km / hr. If it crosses a tunnel in 1 minute, then the length of the tunnel (in meters) is: A. 130 B. 360 C. 500 D. 540 Answer Workspace Report Discuss Answer with explanation Answer: Option C Explanation Speed = 78 x 5 18 m/sec = 65 3 m /sec; Time = 1 minute = 60 sec. Let the length of the tunnel be x meters. Then, 800 + x 60 = 65 3 3(800 + x) = 3900 x = 500. Workspace
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