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That is a pretty easy conversion. The tunnel will be 1.5 kilometers

1,500

m

* 1 km

1000 m

= 1.5

km

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1.5

Q: When completed a tunnel will be 1500 m long what is this length in km?

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2 hours. If the train is one mile long and going 1 mile per hour through a mile long tunnel, in one hour the train would be completely inside the tunnel, since they are the same length and the train is only going one full tunnel length(mile) per hour. It would then take another whole hour for the end of the train to leave the tunnel, bringing the train completely out of the tunnel.

For dimensions, either tall or long depending on what you are describing.For time, the opposite of short (brief) would be long or lengthy.

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There are 1,000 meters in a kilometer (kilo means thousand) 1,500 meters is 1.5 kilometers.

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1 kilometre = 1000 metres so 1.3 km = 1.3*1000 = 1300 m. Simple!

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2 hours. If the train is one mile long and going 1 mile per hour through a mile long tunnel, in one hour the train would be completely inside the tunnel, since they are the same length and the train is only going one full tunnel length(mile) per hour. It would then take another whole hour for the end of the train to leave the tunnel, bringing the train completely out of the tunnel.

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1500/30 = 50 cm in length

120 km/h = 120,000m/hr = 33.333 m/s Distance travelled in 50 seconds = 33.333 * 50 = 1666.666 metres Tunnel length = distance travelled - train length - 1666.666 - 135 = 1531.666metres

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The longest road tunnel in Europe and the World is the Laerdal Tunnel (Lærdalstunnelen) in Norway. It s a 24.5 km (15.2 mi)-long road tunnel connecting Lærdal and Aurland in Sogn og Fjordane county in western Norway. Construction started in 1995 and was completed in 2000, thus succeeding the Gotthard Road Tunnel as the longest road tunnel in the world. The tunnel is a part of the E16 main route between Oslo and Bergen.