Question

how deep are tha ocean trenches​

Answer 1

The deepest parts of the ocean are found in trenches—at more than 35,000 feet (nearly 11,000 meters), Challenger Deep is a part of the Mariana Trench, where the Pacific Plate is subducting beneath the Philippine Plate.

hope this helps..

Answer 2

Answer:

The deepest parts of the ocean are found in trenches—at more than 35,000 feet (nearly 11,000 meters), Challenger Deep is a part of the Mariana Trench, where the Pacific Plate is subducting beneath the Philippine Plate.