Question

which is the longest tunnel in the world under the water ?​

Answer 1

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● Seikan Tunnel

● Seikan Tunnel. Seikan is the world's longest tunnel with an underwater segment, beating the Channel Tunnel in total length, but not in terms of how much is under water.

Answer 2

Answer:

Seikan Tunnel

Explanation:

The Seikan Tunnel is the world's longest tunnel with an undersea segment (The Channel Tunnel, while shorter, has a longer undersea segment)...