Quantity I: A train running at a speed of s km/h crosses a man moving in the same direction along the railway track at 4 km/h. The man can see the tra...
Question
Quantity I: A train running at a speed of s km/h crosses a man moving in the same direction along the railway track at 4 km/h. The man can see the train for 3 minutes. At the moment the train disappears from the man's sight, the distance between the train and the man is 0.8 km. The length of the train is 200 meters. Find the value of s.
Quantity II: A train crosses a man running in the same direction at 2 m/s in 10 seconds. The same train crosses a tunnel in 54 seconds. If the speed of the train is 72 km/h, find the length of the tunnel.
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