If you are using the red brick which are 4" x 8" you will need 4.5 bricks per square foot (just call it five.) 5 x 400 is 2000 bricks.
400 sq. miles = 27,878,400 sq. ft. x 100 = 2,787,840,000 sq. ft.
It depends on the size of the bricks and their orientation.
648
12
A "45-ft vegetable garden" seems to be so skinny that perhaps it could be surrounded by a single row of 90 bricks.
It depends on the size of the bricks.
400 sq. miles = 27,878,400 sq. ft. x 100 = 2,787,840,000 sq. ft.
1.377
4 bricks
It depends on the size of the bricks and their orientation.
648
12
92
169''9
400 ft = 0.07578 miles (1 mile = 5280ft)
A "45-ft vegetable garden" seems to be so skinny that perhaps it could be surrounded by a single row of 90 bricks.
To convert 400 centimeters to feet, you can use the conversion factor that 1 centimeter is approximately 0.0328 feet. Therefore, 400 centimeters is equal to about 13.12 feet (400 cm × 0.0328 ft/cm).