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If a train 500 m long can pass through a tunnel 1 km long in 1.5 minutes, what is the velocity of the train?

April 26, 2017Mathematics pass train tunnel

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If a train 500 m long can pass through a tunnel 1 km long in 1.5 minutes, what is the velocity of the train?

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The tunnel is 1.5 km long, but the train isn’t out of the tunnel until the front of it has gone an additional 500 m (0.5 km) past it so that the back is coming out of the tunnel. So for the train to go completely through the tunnel, it has to travel 1.5 km. v = d/t. The distance is 1.5 km. The time is 1.5 minutes.