The Otira Railway Tunnel, South Island NZ is 8.5 kilometres (5.3 miles ) long.
Otira Tunnel was created in 1923.
Otira's population is 87.
There is an hand sculptured picture of him and his name in there but no hand prints that I saw. And I was there a couple of weeks ago.
A barrel vault can span the length of a tunnel.
The Channel Tunnel is 50.45 km or 31.35 miles.
The Hoosac Tunnel is 4.75 miles in length or 7.64 km long.
16,9 km
It is 1000 times its length in kilometres.
2. 5 , i guess
That would be a barrel vault.
That would be a barrel vault.
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