volume of trench = 10' x 3' x 54' = 1620 cubic feet
therefore 1620 cubic feet of concrete will be required.
1.54321 cubic yards See the related link below
6.67 cubic yards
300m3
12 miles
This is a volume requiring 11.1 cubic yards of cement.
0.246914 cu. yards (6.666667 cu. ft ) of concrete is needed.
Challenger Deep is a very deep spot on Mariana's Trench. Mariana's Trench is very long and Challenger Deep is just a tiny part of it, considered the deepest part.
A long, narrow deep ditch.
There is a wide deep trench over 3 thousand miles long that goes from Turkey south almost to South Africa. It is called The Great Rift Valley.
1.54321 cubic yards See the related link below
An ocean trench is a long, deep depression in the ocean. They are the result of oceanic plates sliding under one another.
A trench.
A deep ocean trench is a deep underwater canyon. It is found at the deepest parts of the ocean. It is long, thin, and has steep sides.
As long as it needed to be to "hold the front". Some of the trenches went on for miles.
400 miles
1,500 ft.
420